KR20050078476A - Plasma display panel - Google Patents

Abstract

A plasma display panel is disclosed. According to the present invention, a front substrate, a back substrate disposed to be opposed thereto, a plurality of electrodes disposed between the plurality of substrates and generating a discharge, and a partition wall disposed between the plurality of substrates and partitioning a discharge space are provided. And a red, green, and blue phosphor layer coated in the discharge space; and a part of the partition wall formed to partition the phosphor layer of any one of the phosphor layers to provide a passage through which exhaust gas is discharged during vacuum exhaust. And an exhaust passage section for opening the exhaust passage section. The exhaust passage section may be configured to open a portion of the partition walls partitioning the same phosphor layer to form an exhaust passage of impurity gas during vacuum exhaust, thereby preventing deterioration in discharge characteristics due to the influence of the impure gas. have.

Description

Plasma display panel {Plasma display panel}

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 having an improved structure of a partition wall partitioning a discharge space coated with a phosphor layer having a poor discharge characteristic due to an impurity gas.

In general, a plasma display panel is a display device that discharges a sealed gas between two substrates on which electrodes are formed, and excites the phosphor layer by ultraviolet rays generated thereby to implement desired numbers, letters, or graphics.

The plasma display panel can be classified into a direct current type and an alternating current type according to a type of driving voltage applied to a discharge cell, for example, a discharge type, and can be classified into a counter discharge type and a surface discharge type according to the configuration of the electrodes.

The DC plasma display panel has a structure in which all electrodes are exposed to a discharge space, and charges are directly transferred between corresponding electrodes. On the other hand, in the AC plasma display panel, at least one electrode is embedded in the dielectric layer, and instead of direct charge transfer between the corresponding electrodes, the ions and electrons generated by the discharge adhere to the surface of the dielectric layer to form a wall. A wall voltage is formed and discharge can be maintained by a sustaining voltage.

In the opposite discharge type plasma display panel, an address electrode and a Y electrode are provided to face each unit pixel, and addressing discharge and sustain discharge are generated between the two electrodes. On the other hand, in the surface discharge type plasma display panel, an address electrode and corresponding X and Y electrodes are provided for each unit pixel to generate addressing discharge and sustain discharge.

Referring to FIG. 1, in the conventional plasma display panel 10, a pair of storage electrodes 12 are formed on a lower surface of the front substrate 11, and the storage electrodes 12 are formed by the front dielectric layer 13. Buried The passivation layer 14 is coated on the front dielectric layer 13.

An address electrode 16 is formed on an upper surface of the rear substrate 15 disposed to face the front substrate 11, and the address electrode 16 is embedded by the rear dielectric layer 17. A partition wall 18 is formed on the back dielectric layer 17 to prevent cross talk between adjacent discharge cells. Red, green, and blue phosphor layers 19 are formed on the surface of the back dielectric layer 17 and on the inner surface of the partition wall 18.

An inert gas is formed in the inner space formed by the combination of the flanks, the front and rear substrates 11 and 15, and the partition wall 18 to have the discharge region 100.

The operation of the plasma display panel 10 having the above structure will be briefly described as follows.

When the driving voltage is applied to the pair of sustain electrodes 12 after the address discharge voltage is applied, discharge occurs in the discharge regions of the front dielectric layer 13 and the passivation layer 14 to generate ultraviolet rays. Color display is performed as the fluorescent material of the surrounding phosphor layer 19 is excited by the generated ultraviolet rays.

That is, space charges in the discharge cell are accelerated by the driving voltage applied thereto, and are mainly composed of neon (Ne), an inert mixed gas filled with a pressure of about 400 to 500 Torr in the discharge cell. It collides with the phening mixed gas to which helium (He) and xenon (Xe) gas are added.

Accordingly, 147 nanometers of ultraviolet rays are generated while the inert gas is excited. The generated ultraviolet rays generate visible light as they collide with the fluorescent material of the phosphor layer 19 surrounding the address electrode 16 and the partition wall 18.

Looking at the manufacturing process of the conventional plasma display panel 10, the step of manufacturing the front substrate 11, the manufacturing of the back substrate 15, and the front and rear substrates (11, 15) for mutual coupling Can be divided into stages.

In detail, a process of manufacturing the back substrate 15 will be described in detail. The address electrode 16 is patterned on the top surface of the back substrate 15, and the address electrode 16 is embedded using the back dielectric layer 17. Done. Subsequently, a lattice-shaped partition wall 18 is formed on the upper surface of the back dielectric layer 17 as shown in FIG. 2. After the partition 18 is formed, red, green, and blue phosphor layers 19 are applied to each discharge space partitioned by the partition 18.

By the way, when the grid-shaped partition wall 18 is employed, the four surfaces are blocked during the vacuum exhaust performed during the process of joining the front and rear substrates 11 and 15, so that the exhaust is not smoothly performed.

As a result, impurity gas remains inside the panel assembly, which may adversely affect the service life characteristics and cause problems such as permanent afterimage and discharge instability. In addition, due to the presence of impurity gas, the discharge firing voltage becomes high, and thus a sufficient voltage margin cannot be secured.

Therefore, efficient exhaust is essential for improving the optical characteristics of the plasma display panel 10. In particular, the impurity gas is discharged to the partition partitioning the discharge space coated with the blue phosphor layer having the most disadvantageous discharge characteristics due to the impurity gas, or the partition partitioning the discharge space coated with the green phosphor layer, which is difficult to secure sufficient voltage margin. It will be said that a means to be done is required.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a plasma display panel having improved discharge characteristics by improving a structure of a partition wall partitioning a phosphor layer having a poor discharge characteristic due to impurity gas.

Another object of the present invention is to provide a plasma display panel having improved discharge characteristics by improving the structure of a partition wall partitioning a phosphor layer having a voltage margin disadvantage due to impurity gas.

In order to achieve the above object, a plasma display panel having an improved structure of a partition wall according to an aspect of the present invention is provided.

Front substrate;

A rear substrate disposed to face the front substrate;

A plurality of electrodes disposed between the front and rear substrates to generate a discharge;

A partition wall disposed between the front and rear substrates and partitioning a discharge space;

Red, green and blue phosphor layers coated in the discharge space; And

And an exhaust passage portion formed in a partition wall partitioning any one phosphor layer of the phosphor and opening a portion of the partition wall to provide a passage through which exhaust gas is discharged during vacuum exhaust.

In addition, the exhaust passage portion is characterized in that it is formed to communicate with each other inside the phosphor layer of the same color.

In addition, the exhaust passage is characterized in that formed in the partition wall partitioning the discharge space coated with the blue phosphor layer.

Further, the exhaust passage portion is characterized in that formed in the partition wall partitioning the discharge space coated with the green phosphor layer.

Further, the exhaust passage portion is a space formed by removing a part of the central portion of the horizontal partition wall.

Plasma display panel according to another aspect of the present invention,

Front substrate;

A storage electrode formed on the front substrate;

A front dielectric layer filling the sustain electrode;

A protective film layer coated on a surface of the front dielectric layer;

A rear substrate disposed to face the front substrate;

An address electrode formed on the rear substrate;

A back dielectric layer filling the address electrode;

Barrier ribs disposed on the front and rear substrates and partitioning a discharge space;

Red, green and blue phosphor layers coated in the discharge space; And

At least one of the green and blue phosphor layers is formed in a partition partitioning the coated discharge space, and an exhaust passage part formed by removing a part of the partition wall to provide a passage through which impurity gas is discharged during vacuum exhaust; It features.

In addition, the exhaust passage portion is formed by opening a portion of the partition wall disposed in the adjacent discharge space to communicate with each other the discharge space coated with the phosphor layer of the same color.

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

3 illustrates a plasma display panel 300 according to an embodiment of the present invention.

Referring to the drawings, the plasma display panel 300 is provided with a front substrate 310 and a rear substrate 320 disposed to face the front substrate 310.

The storage electrode 330 is formed on the bottom surface of the front substrate 310 to be spaced apart by a predetermined interval.

The sustain electrode 330 includes a strip-shaped bus electrode 331, an X electrode 332 having a predetermined size protruding from an inner side wall of the adjacent bus electrode 331, and a Y electrode 333. Doing.

The X electrode 332 and the Y electrode 333 are disposed to be spaced apart by a predetermined interval along the inner wall of the bus electrode 331 in the longitudinal direction, and the opposite X electrode 332 and the Y electrode 333. This protruding region forms one discharge space.

The front dielectric layer 340 is formed on the front substrate 310 on which the storage electrode 330 is formed to fill them. A protective film layer 350, such as a magnesium oxide film, is coated on the entire surface of the front dielectric layer 340.

On the other hand, the address electrode 360 is formed on the upper surface of the rear substrate 320 to be spaced apart by a predetermined interval. The address electrode 360 is disposed in a direction orthogonal to the direction in which the bus electrode 331 is formed. The address electrode 360 is located in a discharge space in which the XY electrodes 332 and 333 are opposed to each other.

A back dielectric layer 370 is formed on the top surface of the address electrode 360 to fill it. A partition wall 380 is formed on the top surface of the back dielectric layer 370 to partition the discharge space and prevent cross talk. The partition wall 380 is disposed in a space between the address electrodes 360. The red, green, and blue phosphor layers 390 are coated on the upper surface of the rear dielectric layer 370 and the inner surface of the partition wall 380 for each discharge space.

According to a feature of the present invention, the exhaust gas is partitioned into a partition wall partitioning a phosphor layer having poor discharge characteristics or a partition wall partitioning a phosphor layer having difficulty in securing a voltage margin so that impurity gas remaining inside the panel can be discharged smoothly during vacuum exhaust. It is in forming a passage part.

More detailed description is as follows.

Referring to the drawing, an address electrode 360 is disposed on the back substrate 320. The address electrode 360 is a strip type spaced apart from each other by a predetermined interval. The address electrode 360 is buried by the back dielectric layer 370.

A partition wall 380 is formed on the top surface of the back dielectric layer 370 to partition the discharge space. The partition 380 includes a horizontal partition 381 disposed in a direction orthogonal to the address electrode 360, and a vertical partition 382 formed in a direction parallel to the address electrode 360. The vertical partition 382 extends from both sidewalls of the horizontal partition 381 and is integrally connected to each other to form a grid. The barrier rib 380 protrudes a predetermined height from a top surface of the rear dielectric layer 370 in a direction in which the front substrate 310 is disposed.

Accordingly, the discharge space partitioned by the partition wall 380 is surrounded by four sides and has a rectangular structure. In the discharge space, red, green, and blue phosphor layers 390R, 390G, and 390B are illustrated in FIG. ) Are each coated.

In this case, an exhaust passage 383 is formed in the partition wall that partitions the discharge space coated with the blue phosphor layer 390B. The exhaust passage part 383 is a space formed by removing a part of the horizontal partition wall 381 so as to provide a passage through which exhaust gas remaining in the panel assembly during vacuum exhaust can proceed.

The exhaust passage 383 is preferably formed in every horizontal partition 381 along a direction parallel to the direction in which the address electrode 360 is disposed. That is, the exhaust passage part 383 opens the central portion of the horizontal partition 381 to a predetermined size so that the exhaust passages communicate with each other in the same phosphor layer, for example, the blue phosphor layer 390B. It is a structure that is connected from one end to the other end of.

In contrast, such an exhaust passage portion 383 is not formed in the partition wall partitioning the discharge space coated with the red phosphor layer 390R or the partition wall partitioning the discharge space coated with the green phosphor layer 390G. .

The exhaust passage portion 383 is formed only on the partition walls that partition the discharge space coated with the blue phosphor layer 390B, so that the blue phosphor layer 390B is best formed by the impurity gas remaining in the panel assembly during vacuum exhaust. This is because the color coordinates deteriorate due to the sensitive reaction, and as a result, the discharge characteristics are deteriorated. The formation of the exhaust passage 383 makes it possible to smoothly exhaust the discharge space coated with the blue phosphor layer 390B, thereby reducing the discharge failure phenomenon.

5 illustrates a case where the exhaust passage part 583 according to the second embodiment of the present invention is formed.

Referring to the drawings, the partition wall 580 includes a horizontal partition 581 disposed in a direction orthogonal to the address electrode 560 and a vertical partition 582 disposed in a direction orthogonal to the address electrode 560 as described above. ) Is included. The horizontal and vertical partitions 581 and 582 are combined to form a lattice structure.

In addition, red, green, and blue phosphor layers 590R, 590G, and 590B are respectively coated in the discharge space partitioned by the partition wall 580.

Here, the exhaust passage part 583 is formed in the partition which partitions the discharge space in which the green fluorescent substance layer 590G was coated. The exhaust passage part 583 opens a part of the central portion of the horizontal partition 581 to provide a passage through which the exhaust gas can be discharged. The discharge space coated with the green phosphor layer 590G is horizontally connected to each other. The partition 581 is formed in common. On the other hand, the exhaust passage portion 583 is not formed in the partition wall partitioning the discharge space coated with the phosphor layers 590R and 590B of red or blue color.

The exhaust passage portion 583 is formed only in the discharge space coated with the green phosphor layer 590G because the discharge start voltage is increased due to the impurity gas remaining in the panel assembly during vacuum exhaust, thereby lowering the voltage margin. Therefore, in order to secure the voltage margin, the passage portion 583 in which the exhaust gas can flow only in the discharge space coated with the green phosphor layer 590G is formed.

Accordingly, during the vacuum evacuation process after sealing the front and back substrates, the exhaust gas remaining in the discharge space coated with the green phosphor layer 590G of the panel assembly is introduced through the exhaust passage portion 583. It will be possible to discharge to the outside.

As described above, in the plasma display panel of the present invention, a part of the partition walls partitioning the same phosphor layer is opened to form an exhaust passage of the impurity gas during vacuum exhaust, thereby preventing the deterioration of the discharge characteristic due to the influence of the impurity gas. have. In addition, it is possible to easily exhaust and prevent an increase in the discharge start voltage due to the impurity gas, thereby ensuring a voltage margin.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a cross-sectional view showing a unit cell of a conventional plasma display panel;

2 is a plan view schematically showing a conventional discharge space;

3 is an exploded perspective view of a plasma display panel partially cut out according to an embodiment of the present invention;

4 is a plan view schematically showing the discharge space of FIG.

5 is a plan view schematically showing a discharge space according to a second embodiment of the present invention;

<Brief description of symbols for the main parts of the drawings>

300 ... plasma display panel

310 ... front substrate 320 ... back substrate

330 Holding Electrode 340 Front Dielectric Layer

350 protective layer 360 address electrode

370 back dielectric layer 380 bulkhead

381 ... Horizontal bulkhead 382 ... Vertical bulkhead

383 Exhaust passageway 390 Phosphor layer

Claims (8)

Front substrate; A rear substrate disposed to face the front substrate; A plurality of electrodes disposed between the front and rear substrates to generate a discharge; A partition wall disposed between the front and rear substrates and partitioning a discharge space; Red, green and blue phosphor layers coated in the discharge space; And And an exhaust passage portion formed in a partition wall partitioning any one of the phosphor layers and opening part of the partition wall to provide a passage through which exhaust gas is discharged during vacuum exhaust. The method of claim 1, And the exhaust passage portion is formed to communicate with each other inside the phosphor layer of the same color. The method of claim 2, And the exhaust passage part is formed in a partition wall partitioning a discharge space coated with the blue phosphor layer. The method of claim 2, And the exhaust passage part is formed in a partition wall partitioning a discharge space coated with the green phosphor layer. The method of claim 1, And the partition wall includes a horizontal partition wall arranged in a direction orthogonal to the address electrode, and a vertical partition wall disposed in a direction parallel to the address electrode and forming a lattice structure with the horizontal partition wall. The method of claim 5, And the exhaust passage portion is a space formed by removing a part of a central portion of the horizontal partition wall. Front substrate; A storage electrode formed on the front substrate; A front dielectric layer filling the sustain electrode; A protective film layer coated on a surface of the front dielectric layer; A rear substrate disposed to face the front substrate; An address electrode formed on the rear substrate; A back dielectric layer filling the address electrode; Barrier ribs disposed on the front and rear substrates and partitioning a discharge space; Red, green and blue phosphor layers coated in the discharge space; And At least one of the green and blue phosphor layers is formed in a partition partitioning the coated discharge space, and an exhaust passage part formed by removing a part of the partition wall to provide a passage through which impurity gas is discharged during vacuum exhaust; Characterized in that the plasma display panel. The method of claim 7, wherein And the exhaust passage portion is formed by opening a portion of a partition wall disposed in an adjacent discharge space so as to mutually communicate a discharge space coated with a phosphor layer of the same color.