KR20060001593A - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel having an improved electrode structure, comprising: a pair of substrates facing each other; An address electrode formed at any one of the substrates; A partition wall disposed in a space between the substrates to form a plurality of discharge cells; A phosphor layer formed in the discharge cell; And a first electrode and a second electrode which face each other to form a discharge gap in the discharge cell, wherein the display area in which the substrate displays an image by combination with the discharge cell, and the image are not displayed. A non-display area, each of the first electrode and the second electrode having at least two line portions, and at least one of a pair of line portions facing each other in the discharge cell to form a discharge gap Has a structure bent in one direction in the non-display area.

Plasma, electrode, bus electrode, panel, discharge, display area, non-display area

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

1 is a partially exploded perspective view of a plasma display panel according to an embodiment of the present invention.

2 is a schematic plan view illustrating a display area and a non-display area of a plasma display panel.

3 is a layout view illustrating an arrangement relationship between the electrode and the partition wall illustrated in FIG. 1.

4 is a layout view illustrating an arrangement relationship between an electrode and a partition wall according to another exemplary embodiment of the present disclosure.

5 is a layout view illustrating an arrangement relationship between an electrode and a partition wall according to another exemplary embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel in which an electrode structure is improved to improve brightness and stabilize discharge.

Plasma display panels (hereinafter, referred to as 'panels') are disposed between a pair of substrates and a pair of sustain electrodes formed to correspond to the discharge cells to form phosphors for each color with ultraviolet rays generated during a plasma discharge process. It is a display which displays an image by exciting.

In this case, in order not to block light emitted from the substrate, the sustain electrode is generally formed of a transparent electrode. However, since the transparent electrode itself has high resistance, in order to compensate for its conductivity, the metal electrode is combined with the transparent electrode to form the sustain electrode.

In this case, the transparent electrode is made of a material such as indium tin oxide (ITO) or SnO _2, and the metal electrode is a thin film made of three layers of Ag, Cr / Cu / Cr, or a thin film made of a two-layer structure of Al / Cr. do.

Such a conventional electrode structure forms a metal electrode on a glass substrate by a photo etching method, a liftoff method, and a transparent electrode by a photo etching method and a liftoff process in the following process. Form by law.

Therefore, there is a disadvantage that the work process is very complicated, thereby increasing the manufacturing cost of the panel. In addition, since the transparent electrode itself is expensive, this also increases the manufacturing cost.

Therefore, efforts are being made to form the storage electrode only with the metal electrode without using the transparent electrode, and one of the related arts includes a "plasma display panel" disclosed in US Pat. No. 6,522,072.

According to this, there is an advantage that the manufacturing cost can be lowered as compared with the electrode structure described above. However, the sustain electrode formed of only the metal electrode has a problem of lowering the aperture ratio of the panel and decreasing luminance.

As an alternative to solving this problem, it is possible to consider a method of increasing the distance between two metal electrodes positioned with the discharge gap in between. However, this may increase the discharge voltage and cause the discharge to become unstable. This is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and provides a plasma display panel of the present invention which is improved to enable stable discharge while satisfactorily improving the brightness of the panel using a metal electrode.

In order to achieve the above object, the plasma display panel provided by the present invention,

A pair of substrates opposed to each other;

An address electrode formed at any one of the substrates;

A partition wall disposed in a space between the substrates to form a plurality of discharge cells;

A phosphor layer formed in the discharge cell; And,

A first electrode and a second electrode facing each other to form a discharge gap in the discharge cell;

The substrate is formed of a display area for displaying an image by a combination with the discharge cells and a non-display area where no image is displayed;

Each of the first electrode and the second electrode,

At least one of a pair of line portions formed of at least two line portions and facing each other in the discharge cell to form a discharge gap has a structure bent in one direction in the non-display area.

In this case, preferably, the non-display area has a structure in which the line part is bent in an inner direction in which an interval between the line parts is larger than the discharge gap gap.

At this time, the line portion is preferably bent in a shape symmetrical with respect to the discharge gap.

In addition, the line portions of the line portions constituting the first electrode or the second electrode facing each other to form a discharge gap may be formed to have a smaller length than other line portions in the non-display area.

In this case, it is preferable that the end of the line part is located at a boundary line dividing the display area from the non-display area.

In the present invention, each of the first electrode and the second electrode,

A first line part formed to face each other with the discharge cell;

A second line portion forming a first discharge gap inside the discharge cell;

And a third line part positioned between the first line part and the second line part.

In this case, the line parts are formed to extend in a direction crossing the address electrode while being spaced apart from each other. Therefore, an empty space is formed between the line portions, thereby improving the luminance.

In addition, a straight connection portion connecting the second line portion and the first line portion across the third line portion in the display area may be further provided for each discharge cell.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

1 is a partially exploded perspective view of a plasma display panel according to an embodiment of the present invention.

Referring to the drawings, the plasma display panel (hereinafter, referred to as 'panel') according to the present embodiment has a pair of substrates 2 and 4 disposed to face each other at random intervals, and the partition wall 12 is disposed between the two substrates. The color-specific discharge cells 8R, 8G, and 8B formed by the are provided. At this time, the address electrodes 8 are preferably located side by side at regular intervals with neighboring address electrodes along the centers of the discharge cells 8R, 8G, and 8B in the width direction (X-axis direction in the drawing).

The address electrodes 8 are formed on the inner surface of the substrate 2 along the Y-axis direction of the drawing, and the dielectric layer 10 is formed on the entire inner surface of the substrate 2 while covering the address electrodes 8.

A partition 12 is formed on the dielectric layer 10, and red, green, and blue phosphor layers 14R, 14G, and 14B are formed on the surfaces of the partition 12 and the dielectric layer 10. do. At this time, the partition wall 12 is disposed between each address electrode 8.

Meanwhile, in the drawing, the partition wall 12 is illustrated as a stripe structure parallel to the neighboring partition walls along the Y-axis direction of the drawing, but the present invention is not limited thereto. For example, the partition 12 has a structure in which discharge cells 8R, 8G, and 8B are arranged in a matrix form by a first partition formed in the X-axis direction and a second partition formed in the Y-axis direction. For example, delta structures in a triangular array may be applied.

In the substrate 4 facing the substrate 2, the sustain electrode 20 including the scan electrode 16 and the common electrode 18 is arranged along a direction orthogonal to the address electrode 8 (the Y-axis direction in the drawing). The dielectric layer 22 and the MgO protective film 24 are disposed on the entire inner surface of the substrate 4 while covering the sustain electrodes 20.

In the present embodiment, the sustain electrode 20 is formed of only a conductive material of metal, thereby forming empty spaces 16a and 18a therein. The electrode structure according to the present embodiment will be described in detail with reference to FIGS. 3 to 5 below.

On the other hand, by the combination of the substrates 2 and 4, the address electrode 8 and the sustain electrode 20 cross each other to form discharge cell regions 8R, 8G, and 8B. It is filled with discharge gases (mainly Ne-Xe mixed gases) which induce the release of vacuum ultraviolet rays.

Based on such a configuration, the panel of this embodiment generates reset discharge between the sustain electrodes 20 to reset the state of charge in the discharge cells. Then, an address voltage is applied between the address electrode 8 and the scan electrode 16 to charge the wall charges. Accordingly, the discharge cell in which the image is represented is selected. After selecting the discharge cells in this way, driving by an image is performed by applying alternating pulses to the sustain electrodes.

On the other hand, the panel of this embodiment is formed of the display area A in which an image is represented and the non-display area B in which the image is not represented (see Fig. 2).

In the present embodiment, the discharge cells positioned in the display area A display an image by the phosphor layer and the discharge gas coated on the partition wall and the discharge cell, respectively. That is, when voltage is applied through each of the electrodes 16 and 18, plasma discharge occurs to excite the discharge gases to generate vacuum ultraviolet rays, and the vacuum ultraviolet rays excite the phosphor layer, thereby expressing a unique color for each discharge cell.

On the other hand, the non-display area B is a margin part necessary for a work process and is a part which does not substantially implement an image.

In Fig. 2, reference numeral 36 denotes a sealing material for sealing between the substrates (2, 4).

Hereinafter, the electrode structure according to the present embodiment will be described, but the sustain electrode 20 of the present embodiment has a non-transparent (ITO-less) electrode structure made of a metal electrode without using a transparent electrode.

FIG. 3 is a view illustrating an electrode structure according to the present exemplary embodiment, and illustrates an arrangement structure of sustain electrodes along partition walls and partition walls at the boundary line O between the display area A and the non-display area B. As shown in FIG.

Referring to FIG. 3, the sustain electrode 20 in the display area A described above in this embodiment includes a pair of first line portions 161 and 181 facing the discharge cells and positioned in parallel with each other, and the first And second line portions 162 and 182 positioned between the line portions 161 and 181 and facing each other inside the discharge cell to form a discharge gap G.

The second line parts 162 and 182 face each other inside the discharge cell in a state where an empty space is formed between the first line parts to form a discharge gap G, and a voltage pulse applied to each electrode. As a result, counter discharge at the initial stage of discharge is formed.

The initial counter discharge is induced between surface discharges while being diffused between the first line portions 161 and 181. At this time, when the distance between the first line portions 161 and 181 and the second line portions 162 and 182 becomes too wide, the discharge does not diffuse, and thus the first line portions 161 and 181 and the second line portions 162 and Third line portions 163 and 183 may be further formed between the 182 to induce discharge diffusion.

In this case, the line parts 161 to 163 and 181 to 183 are formed to extend in a direction crossing the address electrode 8 while being spaced apart from each other.

Accordingly, the counter discharges formed between the second line portions 162 and 182 cross-link the third line portions 163 and 183 to the first line portions 161 and 181 while inducing surface discharge.

Similarly, the sustain electrode 20 of the present embodiment connects the first line portions 161 and 181, the second line portions 162 and 82, and the third line portions 163 and 183 to each other within each discharge cell. The connecting portions 164 and 184 for connecting may be formed in a further added structure (see FIG. 4).

Meanwhile, as described above, the panel according to the present embodiment is divided into the display area A and the non-display area B around the boundary line O. In this case, the electrodes formed in the non-display area B are as follows. It is preferred to have a structure. In addition, although the following description demonstrates the example in which an electrode consists of three line parts, this invention is not limited to this.

First, as illustrated in FIG. 3, the electrodes formed in the non-display area B have first to third line portions formed in the display area A extending to the non-display area B, respectively. Scan electrode 16 and common electrode 18.

At this time, each electrode is drawn from the panel in different directions and connected to a driving unit (not shown) for driving the electrodes. The driving parts are fixedly attached to the rear direction of the panel. In the drawing, the scan electrode 16 is drawn out to the left side, and the common electrode 18 is connected through the leader line 186 in a state where each of the line parts 181 to 183 is connected to each other by the outermost connection part 184a. The structure withdrawn to the right is illustrated.

At this time, the ends of the second line portions 162 and 182 which are formed in the non-display area B based on the boundary line O are bent toward the first line portions 161 and 181.

That is, the third line portion 163 constituting the scan electrode 16 is bent inward toward the first line portion 161 at the point passing through the boundary line O. FIG.

Optionally, similarly to the scan electrode 16 described above, the third line part 183 constituting the common electrode 18 also has a structure connected to the connection part 184a in a state that is bent inward toward the first line part 181. It may be made of. In this case, each of the line portions 163 and 183 is preferably curved to have a symmetrical structure with a discharge gap therebetween.

Accordingly, the third line portions 163 and 183 of the non-display area B face each other to form a second discharge gap 'G2'. Therefore, the second discharge gap G2 is larger than the first discharge gap G1 formed in the display area A when the second line portions 162 and 182 face each other. That is, a relationship like "G1 <G2" is established.

Therefore, since the intensity of the electric field in inverse proportion to the distance is formed around the second discharge gap G2 weaker than the first discharge gap G1, the counter discharge is formed only in the first discharge gap G1 for a predetermined voltage magnitude. As a result, since discharge can be selectively generated only for the discharge cells in the display area A, the problem of erroneous discharge occurring in the non-display area B as in the prior art can be solved.

On the other hand, the boundary line O separating the display area A and the non-display area B is positioned above the partition 12, and the end of the third line part 163 of the scan electrode 16 is positioned along the boundary line. It is desirable to. As a result, since the discharge gap is not formed in the non-display area B, it is possible to solve the problem of erroneous discharge occurring at the source.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto and is intended by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of the claims to be described.

According to the present invention, there is an effect of solving the above-described problem to solve the problem of mis-discharge that occurred in the non-display area to provide a panel with a clearer picture quality than before.

In addition, since the electrodes are formed in a partially formed empty space, there is an advantage in that the opening ratio of the panel is improved compared to the prior art to increase the light emission luminance.

In addition, since each line portion is formed in a structure independent from each other, even if a disconnection occurs in any one electrode, the other line portion compensates for the disconnected electrode, thereby causing a defect due to the electrode disconnection of the panel, while disconnecting the By additional compensation, there is an advantage that the luminous efficiency and luminance can be maintained as it is.

Claims (10)

A pair of substrates opposed to each other; An address electrode formed at any one of the substrates; A partition wall disposed in a space between the substrates to form a plurality of discharge cells; A phosphor layer formed in the discharge cell; And, A first electrode and a second electrode facing each other to form a discharge gap in the discharge cell; The substrate is formed of a display area for displaying an image by a combination with the discharge cells and a non-display area where no image is displayed; Each of the first electrode and the second electrode, And at least one of the pair of line portions facing each other in the discharge cell to form a discharge gap, wherein the plasma display panel is curved in one direction in the non-display area. The method of claim 1, And the line portion is bent in an inward direction in which the space between the line portions is greater than the discharge gap interval in the non-display area. The method of claim 2, And each of the line portions is bent in an inward direction in the non-display area. The method of claim 3, And the line portion is bent in a symmetrical shape with a discharge gap therebetween. The method of claim 1, And a line portion of the line portions forming the first electrode or the second electrode facing each other to form a discharge gap is formed to have a smaller length than other line portions in the non-display area. The method of claim 5, And the end portion of the line having a small length is positioned at a boundary line dividing the display area from the non-display area. The method according to any one of claims 1 to 6, Each of the first electrode and the second electrode, A first line part formed to face each other with the discharge cell; A second line portion forming a first discharge gap inside the discharge cell; And a third line portion positioned between the first line portion and the second line portion. The method of claim 7, wherein And the line parts extend in a direction crossing the address electrode while being spaced apart from each other. The method of claim 7, wherein And a straight connection portion connecting the second line portion and the first line portion to each other across the third line portion in the display area. The method of claim 7, wherein And the line parts and the connection part are formed of metal electrodes.

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