KR100589356B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel for improving the light-contrast contrast of the screen by increasing the absorption efficiency of external light in the members formed on the rear substrate, the rear and front substrate disposed to face each other at any interval; Address electrodes formed on the rear substrate; A partition wall disposed in a space between the rear surface and the front substrate to partition red, green, and blue discharge cells; A fluorescent layer located in each discharge cell; Sustain electrodes formed on the front substrate; Provided is a plasma display panel including at least one black non-discharge portion positioned between discharge cells along an address electrode direction.

Plasma, display, discharge cell, fluorescent layer, non-discharge part, address electrode, sustain electrode, partition, discharge space

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 partial cross-sectional view showing the assembled state of FIG.

3 and 4 are partial cross-sectional views of the plasma display panel showing a modified arrangement of the discharge cells and the black non-discharge unit shown in FIG. 2, respectively.

5 is a partially exploded perspective view of a plasma display panel showing a modification to the embodiment of the present invention.

6 is a partially exploded perspective view showing an AC plasma display panel having a three-electrode surface discharge structure according to the prior art.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to an alternating current plasma display panel having an improved discharge cell structure for improving the clear contrast of a screen.

In general, a plasma display panel (PDP) is a display device for realizing an image by exciting phosphors by vacuum ultraviolet rays caused by gas discharge occurring in a discharge cell. It is attracting attention as the next generation thin display device.

6 is a partially exploded perspective view showing an AC PDP having a three-electrode surface discharge structure according to the prior art.

Referring to the drawings, an address electrode 3, a partition wall 5, and fluorescent layers 7R, 7G, and 7B are formed on a rear substrate 1, and a scan electrode 11 and a common electrode are formed on the front substrate 9. A sustain electrode 15 made of 13 is formed. The address electrode 3 and the sustain electrode 15 are covered with the first dielectric layer 17 and the second dielectric layer 19, respectively, and the red, green, and blue fluorescent layers 7R, 7G, 7B) are arranged in this order.

The discharge space where the address electrode 3 and the sustain electrode 15 cross each other functions as one discharge cell, and the discharge cell is filled with discharge gas (mainly Ne-Xe mixed gas). For reference, reference numeral 21 in the drawing represents an MgO protective film covering the second dielectric layer 19.

By the above-described configuration, an address voltage Va is applied between the address electrode 3 and the scan electrode 11 to select a discharge cell in which light emission will occur through address discharge, and the scan electrode 11 of the selected discharge cell and When the sustain voltage Vs is applied between the common electrodes 13, plasma discharge occurs in the discharge cell. In addition, vacuum ultraviolet rays are emitted from the excitation atoms of Xe generated during plasma discharge, and the vacuum ultraviolet rays excite the fluorescent layer of the discharge cells to emit visible light, thereby enabling color display.

In the PDP operating as described above, the first dielectric layer 17 and the partition wall 5 provided on the rear substrate 1 are usually made of a white dielectric material, which emits the fluorescent layers 7R, 7G, and 7B in the discharge cells. Reflects the visible light generated toward the front substrate 9 to increase the luminous efficiency of the PDP.

However, in the structure of the back substrate 1 described above, since the light incident from the outside of the PDP is reflected together at the first dielectric layer 17 and the partition wall 5, the absorption efficiency of external light is very low when the PDP is operated in a bright room condition. There is a disadvantage of low contrast contrast.

Therefore, a method of forming a black stripe (not shown) on the inner surface of the front substrate 9 or a black dielectric layer (not shown) on the partition 5 is proposed for the purpose of increasing absorption efficiency of external light. Nevertheless, these efforts have certain limitations in improving the clear contrast of screens and have the disadvantage of complicating the structure and manufacturing process of the PDP.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a plasma display panel which can improve the clear contrast of a screen by increasing the absorption efficiency of external light without complicating the PDP structure and manufacturing process. .

In order to achieve the above object, the present invention,

Rear and front substrates, address electrodes formed on the rear substrate, a partition wall disposed between the rear substrate and the front substrate to partition red, green, and blue discharge cells, and a fluorescent layer located in each discharge cell. And a sustain electrode formed on the front substrate, and at least one black non-discharge portion positioned in the direction of the address electrode between the discharge cells.

The black non-discharge unit has an internal space surrounded by the partition wall and has a structure in which a black pigment layer is formed in the internal space. In this case, the barrier rib may have a stacked structure of a white dielectric layer and a black dielectric layer. In addition, the black non-discharge unit may be formed of a region filled with a partition material, and the black non-discharge unit may have a stacked structure of a white dielectric layer and a black dielectric layer.

The red, green and blue discharge cells and the black non-discharge part may be sequentially positioned along the direction of the sustain electrode, or the red and green discharge cells and the black non-discharge part and the blue discharge cell may be sequentially located, and the red discharge cell and the black sludge may be sequentially positioned. It is also possible to arrange all and green and blue discharge cells sequentially.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a partially exploded perspective view of a plasma display panel according to an embodiment of the present invention, Figure 2 is a partial cross-sectional view showing an assembled state of FIG.

Referring to the drawings, a plasma display panel (hereinafter referred to as a 'PDP') according to the present embodiment is disposed with the rear substrate 2 and the front substrate 4 opposed to each other at random intervals, Discharge cells 6R, 6G, 6B are provided to implement any color image with visible light emission by an independent discharge mechanism of each discharge cell 6R, 6G, 6B.

In detail, the address electrodes 8 are formed in one direction (Y direction of the drawing) on the inner surface of the rear substrate 2, and the entire inner surface of the rear substrate 2 is covered while covering the address electrodes 8. The first dielectric layer 10 is formed in the. The address electrodes 8 are formed in a stripe pattern, for example, and are arranged side by side with a predetermined distance from the neighboring address electrodes 8.

On the first dielectric layer 10, a partition 12, for example, a stripe pattern partition 12 parallel to the address electrode 8, is disposed on the side surface of the partition 12 and the upper surface of the first dielectric layer 10. Green and blue fluorescent layers 14R, 14G, 14B and black pigment layer 16 are provided in this order. At this time, the shape of the partition wall 12 is not limited to the stripe pattern, it may be formed of a closed structure such as a lattice or other patterns.

On the inner surface of the front substrate 4 facing the rear substrate 2, a sustain electrode made of the scan electrode 18 and the common electrode 20 along a direction orthogonal to the address electrode 8 (X direction in the drawing) ( 22 is formed, and the second dielectric layer 24 and the MgO passivation layer 26 are disposed on the entire inner surface of the front substrate 4 while covering the storage electrodes 22.

In this embodiment, the scan electrode 18 and the common electrode 20 are positioned at one edges of the stripe-shaped transparent electrodes 18a and 20a and the transparent electrodes 18a and 20a, respectively. It consists of bus electrodes 18b and 20b which complement conductivity. Indium tin oxide (ITO) is preferable for the transparent electrodes 18a and 20a, and metals containing silver (Ag), aluminum (Al), or copper (Cu) are used as the bus electrodes 18 and 20b. Electrodes are preferred.

By the combination of the back substrate 2 and the front substrate 4, the discharge space where the address electrode 8 and the sustain electrode 22 intersect constitute one discharge cell 6R, 6G, 6B, and discharge The cells 6R, 6G, 6B are filled with discharge gas (mainly Ne-Xe mixed gas).

Here, the PDP according to the present invention forms a black non-discharge portion 28 along the address electrode direction (Y direction in the drawing) in addition to the red, green, and blue discharge cells 6R, 6G, and 6B, on the rear substrate 2. The structure which raises the absorption efficiency of external light is applied.

In the present exemplary embodiment, the black non-discharge portion 28 has an inner space surrounded by the partition 12 and has a structure in which a black pigment layer 16 is formed over the side surface of the partition 12 and the upper surface of the first dielectric layer 10. At this time, since the black non-discharge portion 28 is a non-discharge region where no discharge occurs, the address electrode 8 may not be provided.

The black non-discharge portion 28 having the above-described configuration can be easily manufactured by forming a black pigment layer 16 without deforming the partition 12. Specifically, the black non-discharge unit 28 prepares a paste containing MnO ₂ as a main component, prints it on the back substrate 2 in the same manner as printing red, green, and blue phosphors, and then dries and fires the same. It can be easily produced through.

With the above-described configuration, the PDP according to the present embodiment functions to increase the bright room contrast of the screen by absorbing the external light when the black non-discharge unit 28 operates in the bright room condition with external light.

At this time, the partition 12 is preferably formed of a laminated structure of a white dielectric layer 12a and a black dielectric layer 12b, as shown in FIG. The white dielectric layer 12a reflects the visible light generated by the emission of the fluorescent layers 14R, 14G, and 14B in the discharge cells 6R, 6G, and 6B toward the front substrate 4 to increase the light emission efficiency, and increases the black dielectric layer ( 12b) increases the external light absorption efficiency of the partition 12.

As shown in FIG. 2, the discharge cells 6R, 6G, and 6B and the black non-discharge portions 28 provided on the rear substrate 2 are red, green, and green in the sustain electrode direction (the X direction in the drawing). The blue discharge cells 6R, 6G, 6B and the black non-discharge portions 28 may be disposed in this order.

As another embodiment, as shown in FIG. 3, the red and green discharge cells 6R and 6G, the black non-discharge portions 28 and the blue discharge cells 6B are sequentially formed along the sustain electrode direction (the X direction in the drawing). As shown in FIG. 4, the red discharge cells 6R, the black non-discharge portions 28, and the green and blue discharge cells 6G and 6B are sequentially formed along the sustain electrode direction (X direction in the drawing). Arrangement is also possible.

On the other hand, the black non-discharge portion 28 may be made of a modified structure shown in Figure 5 in addition to the structure of the above-described embodiment.

Referring to the drawings, in the present modification, the black non-discharge portion 30 is formed of a region filled with the partition material, and does not have an inner space surrounded by the partition wall 12 unlike the above-described embodiment. The black non-discharge portion 30 widely applies the barrier material on the first dielectric layer 10 and removes a portion of the barrier material by using a conventional sand blast method to form a discharge space. In the part corresponding to), it can be easily manufactured by the method of leaving the partition material without removing it.

Preferably, in the present modified example, the partition 12 has a stacked structure of a white dielectric layer 12a and a black dielectric layer 12b, and the red, green, and blue discharge cells according to the sustain electrode direction (X direction in the drawing) ( The positions of 6R, 6G, 6B) and the black non-discharge portion 30 are possible in all of the configurations shown in FIGS. 3, 4, and 5.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to

As described above, according to the exemplary embodiment of the present invention, since the black non-discharge portion positioned along the address electrode direction is provided between the discharge cells, the black non-discharge portion absorbs external light to improve the clear contrast of the screen. At this time, the black non-discharge part is made of a structure in which a black pigment layer is formed in the inner space surrounded by the partition wall or a region filled with the partition material, so that the black non-discharge part can be easily implemented through slight deformation without greatly modifying the PDP structure and the manufacturing method. .

Claims (8)

Front and rear substrates disposed to face each other at arbitrary intervals; Address electrodes formed on an opposite surface of the rear substrate to the front substrate; A partition wall disposed in a space between the rear substrate and the front substrate to partition red, green, and blue discharge cells, and having a stacked structure of white and black dielectric layers; A fluorescent layer located in each of the discharge cells; Sustain electrodes formed on a surface opposite to the rear substrate of the front substrate along a direction crossing the address electrode; And At least one black non-discharge unit positioned along the address electrode direction between the discharge cells and having a structure in which a black pigment layer is formed in the interior space while the interior space is surrounded by the partition wall. Plasma display panel comprising a. delete delete Front and rear substrates disposed to face each other at arbitrary intervals; Address electrodes formed on an opposite surface of the rear substrate to the front substrate; A partition wall disposed in a space between the rear substrate and the front substrate to partition red, green, and blue discharge cells, and having a stacked structure of white and black dielectric layers; A fluorescent layer located in each of the discharge cells; Sustain electrodes formed on a surface opposite to the rear substrate of the front substrate along a direction crossing the address electrode; And At least one black non-discharge portion disposed between the discharge cells along the address electrode direction and formed of a region filled with a barrier material; Plasma display panel comprising a. The method of claim 4, wherein And the black non-discharge portion has a stacked structure of a white dielectric layer and a black dielectric layer. The method according to claim 1 or 4, And red, green, and blue discharge cells and a black non-discharge portion are sequentially positioned along the sustain electrode direction. The method according to claim 1 or 4, And red and green discharge cells, a black non-discharge portion, and a blue discharge cell are sequentially positioned along the sustain electrode direction. The method according to claim 1 or 4, And a red discharge cell, a black non-discharge part, and green and blue discharge cells are sequentially positioned along the sustain electrode direction.

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