KR100705824B1 - The Plasma Display Panel and Method of Manufacturing thereof - Google Patents

Abstract

The present invention relates to a plasma display panel and a method of manufacturing the same. A plasma display panel of the present invention comprises: an address electrode formed on a front glass; A first upper dielectric layer covering the address electrode; A scan electrode and a sustain electrode formed on the first dielectric layer; And a second upper dielectric layer covering the scan electrode and the sustain electrode, wherein the address electrode is formed to correspond to each of the scan electrode and the sustain electrode. In this case, the address electrode may be formed smaller than the width of each of the scan electrode and the sustain electrode. Thus, by forming the address electrode on the front panel, there is an effect of preventing damage to the substrate due to deterioration of the phosphor and reduction of the lifetime of the phosphor. In addition, since the address electrodes are formed so as to correspond to the scan electrodes and the sustain electrodes, there is an effect of increasing the aperture ratio during plasma discharge. In addition, there is an effect of reducing the price of the plasma display panel by not using an expensive transparent electrode when forming the scan electrode and the sustain electrode.

Plasma Display Panel, PDP, Front, Rear, Bus, Electrode, Scan, Sustain

Description

Plasma Display Panel and Method of Manufacturing Technical Field

1 is a perspective view showing the structure of a conventional plasma display panel.

2 is a plan view showing an electrode array structure of a conventional plasma display panel.

3 is a side view showing a discharge in a conventional plasma display panel;

4 is a perspective view showing the structure of a front panel of another conventional plasma display panel;

5 is a perspective view showing the structure of a plasma display panel of the present invention;

6 is a plan view illustrating an electrode structure formed on the front panel of FIG. 5.

7 is a flowchart sequentially illustrating a method of manufacturing a plasma display panel according to an embodiment of the present invention.

8 is a flowchart illustrating a method of manufacturing a front panel of a plasma display panel according to an embodiment of the present invention.

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

500: front panel 502: address electrode

503: first upper dielectric layer 504: scan electrode

505: sustain electrode 506: second upper dielectric layer

The present invention relates to a plasma display panel and a method of manufacturing the same.

In general, a plasma display panel is a partition wall formed between a front panel and a rear panel to form one unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and An inert gas containing the same main discharge gas and a small amount of xenon is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. A general structure of such a plasma display panel is illustrated in FIG. 1.

1 is a perspective view illustrating a structure of a general plasma display panel.

As shown in FIG. 1, a plasma display panel includes a front panel including a plurality of sustain electrode pairs formed by pairing a scan electrode 102 and a sustain electrode 103 on a front glass 101, which is a display surface on which an image is displayed. The rear panel 110 on which the plurality of address electrodes 113 are arranged so as to intersect the plurality of sustain electrode pairs on the back glass 111 forming the back surface 100 and the rear surface is 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 the upper dielectric layer 104 top surface. In order to do this, a protective layer 105 on which magnesium oxide (MgO) is deposited is formed.

The rear panel 110 is arranged on the rear glass 111 with a plurality of discharge spaces, that is, partitions 112 of a stripe type (or well type) for forming a discharge cell in parallel. In addition, a plurality of address electrodes 113 which perform address discharge to generate vacuum ultraviolet rays are arranged in parallel with the partition wall 112.

On the upper side of the rear panel 110, R, G, and B phosphors 114 which emit visible light for image display during address 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.

An electrode array structure of the plasma display panel having such a structure is illustrated in FIG. 2.

2 is a plan view illustrating an electrode array structure of a conventional plasma display panel.

As shown in FIG. 2, the plasma display panel includes scan electrodes Y ₁ , Y ₂ , Y ₃ ..., _M , and sustain electrodes Z ₁ , Z ₂ , Z ₃ . Z _m ) are arranged side by side and address electrodes (X ₁ , X ₂ , X ₃ ... X _(n-2) , X _(n-1) , X _n so as to intersect with the scan electrode and the sustain electrode ₎ . The lines are arranged.

In this way, discharge cells for discharge are formed at points where the arranged scan electrodes, the sustain electrodes and the address electrodes intersect.

In the conventional plasma display panel having such an electrode arrangement, the distance between the scan electrode and the sustain electrode is narrow, resulting in a low luminous efficiency.

In order to solve this problem, a method of forming the distance between the scan electrode and the sustain electrode as long as a predetermined length, that is, to form a large gap between the electrodes has been proposed, which is called a long column structure.

The discharge generated in the plasma display panel having the long column structure is illustrated in FIG. 3.

3 is a side view illustrating a discharge in a conventional plasma display panel.

As shown in FIG. 3, when a driving voltage is applied between the address electrode 113 and the scan electrode 102, an opposite discharge occurs between the address electrode 113 and the scan electrode 102, thereby forming a protective layer of the upper structure. 105) Wall charges are generated on the surface. Addressing is performed through a process in which discharge voltages having opposite polarities are continuously applied to the scan electrode 102 and the sustain electrode 103.

Thereafter, the driving voltage applied to the address electrode 113 is cut off, and the discharge is maintained by the sustain pulse alternately applied to the scan electrode 102 and the sustain electrode 103.

At this time, when the discharge sustain voltage is applied from the scan electrode bus electrode 102b and the sustain electrode bus electrode 103b, the dielectric layer 104 and the protective layer 105 on the scan electrode 102 and the sustain electrode 103 are applied. ) Surface discharge occurs in the discharge space on the surface.

As a result, ultraviolet rays are generated from the inert gas in the discharge space. The phosphor 114 is excited by the ultraviolet rays, and color display is performed by the emitted phosphor 114.

As described above, in the plasma display panel having the long column structure, since the gap between the scan electrode 102 and the sustain electrode 103 is large, before the surface discharge between the scan electrode 102 and the sustain electrode 103 occurs, the address electrode ( The counter discharge first occurs between the 113 and the scan electrode 102.

However, due to the opposite discharge, the phosphor 114 is deteriorated to cause damage to the rear glass 111, and the uniformity of the phosphor 114 is lowered, thereby causing a decrease in the uniformity of the reset using the opposite discharge. .

In order to solve this problem, another plasma display panel in which an address electrode is disposed on a front panel and an electrode is formed using only a bus electrode has been proposed.

4 is a perspective view showing the structure of a front panel of another conventional plasma display panel.

As shown in FIG. 4, in the conventional plasma display front panel, an address electrode 401 is formed on the front glass 400, and a first dielectric layer 404a is formed to cover the address electrode 401 described above. .

In addition, a scan electrode 403 and a sustain electrode 404 formed of a transparent electrode a made of a transparent ITO material and a bus electrode b made of a metal material are formed on the first dielectric layer 404 a. A second dielectric layer 404b is formed to limit the discharge current between one scan electrode 403 and the sustain electrode 404 and to insulate the pair of electrodes.

On the upper surface of the second dielectric layer 404b, a protective layer 405 on which magnesium oxide (Mgo) is deposited is formed to facilitate discharge conditions.

However, in the structure of the conventional plasma display 3-electrode surface discharge front panel, since the pattern area of the address electrode 401, the scan bus electrode 402b and the sustain bus electrode 403b is formed on the effective screen of the front panel, The problem that the aperture ratio drops during plasma discharge occurs.

In addition, the transparent electrodes a of the scan electrodes 402 and the sustain electrodes 403 cause expensive prices of the plasma display panel by using expensive ITO.

Accordingly, an object of the present invention is to provide a plasma display panel in which an address electrode is formed on a front panel so as to correspond to a bus electrode, and a method of manufacturing the same.

A plasma display panel for achieving the object of the present invention comprises an address electrode formed on the front glass; A first upper dielectric layer covering the address electrode; A scan electrode and a sustain electrode formed on the first dielectric layer; And a second upper dielectric layer covering the scan electrode and the sustain electrode, wherein the address electrode is formed to correspond to each of the scan electrode and the sustain electrode.

In this case, the address electrode may be formed smaller than the width of each of the scan electrode and the sustain electrode.

In addition, the scan electrode and the sustain electrode may be formed of a metal electrode.

In addition, the method of manufacturing a plasma display panel according to the present invention includes the steps of: (a) forming an address electrode on the front glass; (b) forming a first upper dielectric layer on the address electrode; (c) forming a scan electrode and a sustain electrode on the first upper dielectric layer; And (d) forming a second upper dielectric layer on the scan electrode and the sustain electrode, wherein the address electrode is formed to correspond to each of the scan electrode and the sustain electrode.

In this case, the address electrode may be formed smaller than the width of each of the scan electrode and the sustain electrode.

The scan electrode and the sustain electrode are formed of a metal electrode.

Hereinafter, a plasma display panel and a method of manufacturing the same according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

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

As shown in FIG. 5, the plasma display panel 10 of the present invention includes a front panel 500 and a rear panel 510.

First, the front panel 500 includes an address electrode 502, a first upper dielectric layer 503, a scan electrode 504, a sustain electrode 505, a second upper dielectric layer 506, and a protective layer 507. Is done.

Here, the address electrode 502 is formed on the front glass 501 to generate an address ultraviolet discharge to generate a vacuum ultraviolet ray.

The first upper dielectric layer 503 protects the coating door address electrode 502 on the address electrode 502.

The scan electrode 504 and the sustain electrode 505 are made of a metal material to mutually discharge in one discharge cell and maintain light emission of the cell.

The second upper dielectric layer 506 limits the discharge current of the scan electrode 504 and the sustain electrode 505 and insulates the electrode pairs.

The protective layer 507 is formed by depositing magnesium oxide (MgO) on the upper surface of the second upper dielectric layer 506 to facilitate discharge conditions.

In addition, the rear panel 510 includes a lower dielectric layer 512, a partition 513, and a phosphor 514.

The lower dielectric layer 512 is applied on the back glass 511.

The partition wall 513 is formed on the rear glass 511 to separate phosphors of R (red), G (green), and B (blue) colors, thereby preventing electrical and optical crosstalk between discharge cells. do.

The R, G, and B phosphors 514 are respectively applied in the discharge cells partitioned by the partition walls 513, and emit visible light for image display during address discharge.

The front panel of the plasma display panel configured as described above will be described in more detail with reference to FIG. 6.

6 is a plan view illustrating an electrode structure formed on the front panel of FIG. 5.

As shown in FIG. 6, the scan electrode 504 and the sustain electrode 505 are ITOless using only a bus electrode made of metal, without using a transparent electrode formed of ITO. The scan electrode 504 and the sustain electrode 505 made of only the bus electrodes are formed of a plurality of electrode lines in one discharge cell. The scan electrode 504 and the sustain electrode 505 formed of a plurality of electrode lines have a fence type electrode structure electrically connected to each other.

As described above, the scan electrode 504 and the sustain electrode 505 formed only of the bus electrode are formed with a predetermined pattern to increase the aperture ratio, and the address electrode 502 corresponds to the scan electrode 504 and the sustain electrode 505. To be located. For example, by forming the area of the address electrode 502 smaller than the area of the scan electrode 504 and the sustain electrode 505, the aperture ratio is improved during plasma discharge.

In addition, manufacturing cost can be reduced by not using an expensive transparent electrode.

A method of manufacturing the plasma display panel is described with reference to FIG. 7.

7 is a flowchart sequentially illustrating a method of manufacturing a plasma display panel according to an embodiment of the present invention.

As shown in FIG. 7, the manufacturing method of the plasma display panel includes a front panel manufacturing process (S700 ˜ S705), a rear panel manufacturing process (S710 ˜ S712), and a bonding process (S720).

First, looking at the manufacturing process of the front panel, after preparing the front glass (S700), a plurality of address electrodes are formed on the front glass (S701). Thereafter, a first upper dielectric layer is formed over the address electrode (S702), and a sustain electrode pair made of metal is formed over the first upper dielectric layer (S703).

Thereafter, a second upper dielectric layer is formed to cover the sustain electrode pair (S704), and a protective layer formed by depositing magnesium oxide (MgO) is formed to facilitate discharge conditions (S705).

In addition, looking at the manufacturing process of the rear panel, after preparing the rear glass (S710), a plurality of partitions are formed on the rear glass (S711). In this way, R, G, and B phosphors are coated in the discharge space between the partition walls partitioned (S712).

The front panel and the rear panel manufactured as described above are bonded to each other to form a plasma display panel (S720).

Here, in the above-described method of manufacturing the plasma display panel, the process of manufacturing the front panel will be described in more detail with reference to FIG. 8.

8 is a flowchart illustrating a method of manufacturing a front panel of a plasma display panel according to an exemplary embodiment of the present invention.

As shown in FIG. 8, a method of manufacturing a front panel of a plasma display panel includes forming an address electrode on a front glass; Forming a first upper dielectric layer on the address electrode; Forming a scan electrode and a sustain electrode on the first upper dielectric layer; And forming a second upper dielectric layer on the scan electrode and the sustain electrode.

In this case, the address electrode is formed to correspond to the scan electrode and the sustain electrode.

Looking at the manufacturing method of the front panel of the plasma display panel made in this way in more detail as follows.

First, in step (a), a metal address electrode 502 is formed on the front glass 501 to correspond to the scan electrode 504 and the sustain electrode 505. For example, the address electrode is formed smaller than the scan electrode and the sustain electrode.

Thereafter, in step (b), the first upper dielectric layer 503 is formed to cover the address electrode 502.

As an example of a method of forming the first upper dielectric layer 503, the dielectric glass paste is coated and dried, and then fired at a temperature of about 500 ° C. to 600 ° C. to form the first upper dielectric layer 503.

Thereafter, in step (c), the silver (Ag) paste 600 is coated and printed to form a scan electrode 504 and a sustain electrode 505 serving as a bus electrode, and then dried and a photo having a predetermined pattern formed thereon. The mask 601 is placed on the coated silver (Ag) paste 600 and exposed.

After the exposure process, in step (d), the uncured portion is developed in the exposure step and then fired in a calcination furnace (not shown) of about 550 ° C. or higher, so that the scan bus electrode 504 and the sustain bus electrode ( 505 is formed.

Thereafter, in step (e), the second upper dielectric layer 506 is formed on the front glass 701 on which the scan electrode 504 and the sustain electrode 505 are formed, and the CVD method, the ion plating method, the vacuum deposition method, or the like is used. By forming a protective film 507 made of magnesium oxide (MgO), the front panel of the plasma display panel is completed.

Thus, by forming the address electrode 502 on the front panel, the high-energy charged particles generated at the address electrode 502 during plasma discharge prevent collision with the phosphor 514 so that the phosphor and the back glass 511 It can prevent damage.

As a result, the problem of deterioration of the phosphor can be prevented and the lifetime of the phosphor is also long.

In addition, since the address electrode 502 is formed to correspond to the scan electrode 504 and the sustain electrode 505, the aperture ratio can be increased during plasma discharge.

In addition, the cost of the plasma display panel can be reduced by not using the expensive transparent electrode a when forming the scan electrode 504 and the sustain electrode 505.

As described in detail above, the present invention forms an address electrode on the front panel, thereby preventing damage to the substrate due to deterioration of the phosphor and reducing the lifetime of the phosphor.

In addition, since the address electrodes are formed so as to correspond to the scan electrodes and the sustain electrodes, there is an effect of increasing the aperture ratio during plasma discharge.

In addition, there is an effect of reducing the price of the plasma display panel by not using an expensive transparent electrode when forming the scan electrode and the sustain electrode.

Claims (8)

An address electrode formed on the front glass; A first upper dielectric layer covering the address electrode; A scan electrode and a sustain electrode formed on the first upper dielectric layer; And A second upper dielectric layer covering the scan electrode and the sustain electrode; And the address electrode is formed to correspond to each of the scan electrode and the sustain electrode. The method of claim 1, And the address electrode is smaller than a width of each of the scan electrode and the sustain electrode. The method of claim 1, And the scan electrode and the sustain electrode are formed of a metal electrode. (a) forming an address electrode on the front glass; (b) forming a first upper dielectric layer on the address electrode; (c) forming a scan electrode and a sustain electrode on the first upper dielectric layer; And (d) forming a second upper dielectric layer on the scan electrode and the sustain electrode, And the address electrode is formed to correspond to each of the scan electrode and the sustain electrode. The method of claim 4, wherein And the address electrode is smaller than a width of each of the scan electrode and the sustain electrode. The method of claim 4, wherein And the scan electrode and the sustain electrode are formed of a metal electrode. The method of claim 1, And the scan electrode and the sustain electrode each comprise two or more electrode lines. The method of claim 7, wherein And the scan electrode and the sustain electrode formed of a plurality of electrode lines have a fence structure electrically connected to each other.

Images