KR100730216B1 - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to form an impurity gas path in a vacuum exhaust process by using a barrier rib having a first to third openings. A second substrate(320) is arranged opposite to a first substrate(310). An electrode is disposed between the first and second substrates in order to induce discharge. A barrier rib(380) includes a first and second barrier ribs which are disposed between the first and second substrates in order to form a lattice structure and to define discharge spaces. Red, green, and blue phosphor layers are formed in discharge spaces. The barrier rib includes openings formed at a part thereof so that the discharge space having the red phosphor layer is larger than the discharge space having the green phosphor layer and the discharge space having the green phosphor layer is larger than the discharge space having the blue phosphor layer.

Description

Plasma display panel {Plasma display panel}

1 is a cross-sectional view illustrating 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 illustrating a partial cutting of the plasma display panel according to an exemplary embodiment of the present invention.

FIG. 4 is an exploded perspective view illustrating the plasma display panel of FIG. 3 with a partial cutaway.

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

300 ... plasma display panel

310 ... 1st board 320 ... 2nd board

330 Holding Electrode 331 Bus Electrode

332 ... X electrode 333 ... Y electrode

340 ... front dielectric layer 350 ... protective layer

360 ... address electrode 370 ... backside dielectric layer

380 Bulkhead 381 Horizontal bulkhead

382 ... vertical bulkheads 383 ... open

390 ... phosphor layer

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 that facilitates adjustment of a white balance.

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.

On the other hand, 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.

1 illustrates a unit discharge cell of a conventional plasma display panel 100.

Referring to the drawings, the plasma display panel 100 includes a first substrate 110, a second substrate 120 disposed to face the first substrate 110, and a pair of holdings coated on a lower surface of the first substrate 110. The electrode 130, the first dielectric layer 140 filling the sustain electrode 130, the passivation layer 150 coated on the surface of the first dielectric layer 140, and the second substrate 120 An address electrode 160 coated on the upper surface, a second dielectric layer 170 filling the address electrode 160, and a partition wall 180 disposed between the first and second substrates 110 and 120; And a red, green, and blue phosphor layer 190 coated in the discharge space inside the partition wall 180.

The partition wall 180 is formed to partition the discharge space, and the horizontal partition wall 181 disposed in a direction orthogonal to the address electrode 160 is parallel to the address electrode 160 as illustrated in FIG. 2. The vertical partition wall 182 arrange | positioned in the direction is provided. The horizontal and vertical barrier ribs 181 and 182 are combined to form a lattice structure. In the discharge space partitioned by the horizontal and vertical barrier ribs 181 and 182, red, green, and blue phosphor layers 190R, 190G, and 190B are coated in each discharge space.

However, the red, green, and blue phosphor layers 190R, 190G, and 190B differently adjust the amount of each phosphor layer 190R, 190G, and 190B to achieve a white balance. . In this case, in order to adjust the white balance due to the green phosphor layer 190G, a relatively small amount of the red phosphor layer 190R should be applied in the discharge space.

In addition, since the grid-shaped partition wall 180 partitions the discharge space in which the red, green, and blue phosphor layers 190R, 190G, and 190B are coated, the discharge space has a four-sided sealed structure. . Therefore, the exhaust of the impure gas is not smoothly performed in the vacuum exhaust process. 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.

SUMMARY OF THE INVENTION The present invention provides a plasma display panel having an improved structure of a partition wall so as to coat different amounts of phosphor layers in each discharge space in order to achieve the white balance by solving the conventional problems as described above.

The present invention is a first substrate; A second substrate disposed to face the first substrate; An electrode disposed between the first and second substrates to generate a discharge; A partition wall disposed between the first and second substrates, the first partition wall and the second partition wall being coupled to each other to form a lattice structure, and partitioning a discharge space inside the first and second partition walls; And red, green, and blue phosphor layers coated in the respective discharge spaces, and the barrier ribs are partially removed so that the red phosphor layer, the green phosphor layer, and the blue phosphor layer are coated in different amounts. An additional plasma display panel is provided.

In the present invention, the opening is preferably formed such that the red phosphor layer is larger than the discharge space coated with the green phosphor layer, and the discharge space coated with the green phosphor layer is larger than the discharge space coated with the blue phosphor layer.

In the present invention, the opening is preferably formed to communicate with each other the discharge space is coated with red, blue, green phosphor layer.

In the present invention, the opening is preferably a space formed by removing a part of the central portion of the first partition wall.

Another aspect of the invention, the first substrate; A sustain electrode having a bus electrode formed on the first substrate and an XY electrode disposed in the discharge space from the bus electrode; A front dielectric layer filling the sustain electrode; A protective film layer coated on a surface of the front dielectric layer; A second substrate disposed to face the first substrate; An address electrode formed on the second substrate; A back dielectric layer filling the address electrode; A partition wall disposed between the first and second substrates, the first partition wall and the second partition wall being coupled to each other to form a lattice structure, and partitioning a discharge space inside the first and second partition walls; Red, green, and blue phosphor layers coated in the discharge spaces; And an opening formed in a partition wall partitioning the discharge space coated with the phosphor layer, and a portion of the partition wall removed so that the red phosphor layer, the green phosphor layer, and the blue phosphor layer are coated in different amounts. Provide a display channel.

In the present invention, the opening is formed such that the discharge space coated with the red phosphor layer is larger than the discharge space coated with the green phosphor layer, and the discharge space coated with the green phosphor layer is larger than the discharge space coated with the blue phosphor layer. It is preferable.

In the present invention, the opening is preferably formed to communicate with each other the discharge space is coated with red, blue, green phosphor layer.

In the present invention, the opening is preferably a space formed by removing a part of the central portion of the first partition wall.

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

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 first substrate 310 and a second substrate 320 disposed to face the first substrate 310.

The storage electrode 330 is disposed on the bottom surface of the first substrate 310 to be spaced apart from each other by a predetermined interval. The sustain electrode 330 may include a bus electrode 331 having a strip shape, 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. It is included. 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. Is located in one discharge space.

A first dielectric layer 340 is formed on the first substrate 310 to fill the bus electrode 331 and the XY electrodes 332 and 333, and is formed on the surface of the first dielectric layer 340. The protective film layer 350, such as a magnesium oxide film, is entirely coated.

On the other hand, the address electrode 360 is formed on the upper surface of the second substrate 320 to be spaced apart by a predetermined interval. The address electrode 360 is positioned in a direction perpendicular to the direction in which the bus electrode 331 is disposed. A second dielectric layer 370 is formed on the upper surface of the address electrode 360 to fill it. A partition wall 380 is formed on the top surface of the second dielectric layer 370 to partition the discharge space and prevent cross talk. On the upper surface of the second dielectric layer 370 and the inner surface of the partition wall 380, red, green, and blue phosphor layers 390 are coated for each discharge space.

According to a feature of the present invention, the structure of the barrier rib is changed so that the red phosphor layer is coated less than the green phosphor layer, and the structure of the barrier rib is changed so that the green phosphor layer is coated less than the blue phosphor layer in order to achieve white balance. In more detail, as shown in FIG.

4 is an enlarged view of a portion of the plasma display panel 300 of FIG. 3. Here, the same reference numerals as in the above-described drawings indicate the same members having the same function.

Referring to FIG. 4, an address electrode 360 is disposed in a strip shape on the second substrate 320. The address electrode 360 is buried by the second dielectric layer 370.

A partition wall 380 is formed on the top surface of the second 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 disposed in a direction parallel to the address electrode 360. The vertical bulkheads 382 extend from both sidewalls of the horizontal bulkheads 381, and are integrally connected to each other to form a grid. The partition wall 380 protrudes a predetermined height from a top surface of the second dielectric layer 370 in a direction in which the first substrate 310 is disposed.

Accordingly, the discharge space partitioned by the partition wall 380 is surrounded by four sides, and the unit discharge space is rectangular. Red, green, and blue phosphor layers 390R, 390G, and 390B are respectively coated in the discharge space. In the present exemplary embodiment, the red, green, and blue phosphor layers 390R, 390G, and 390B are coated in adjacent discharge spaces in parallel with the address electrode 360 for the same color.

In this case, the first opening 383R defines a partition 380 that partitions the discharge space coated with the red phosphor layer 390R, and the partition 380 that partitions the discharge space coated with the green phosphor layer 390G. The third opening 383B is formed in the partition wall 380 in which the second opening 383G divides the discharge space coated with the blue phosphor layer 390R.

 The first to third openings 383R, 383G, and 383B remove the portion of the barrier rib 380 so as to apply the most amount of the red phosphor layer 390R coated on the inner wall of the barrier rib 380. Reduce the coating amount of the green phosphor layer 390G than that of the red phosphor layer 390R, and reduce the coating amount of the blue phosphor 390B than the green phosphor layer 390G to adjust the white balance to reduce the color temperature. Can be improved.

To this end, the first to third openings 383R, 383G, and 383B are formed by removing a part of the partition wall 380 partitioning the discharge space, and the direction in which the address electrode 360 is disposed. It is a space formed by removing a portion of the central portion of the horizontal partition wall 381 disposed for each of the discharge spaces in which red, green, and blue phosphor layers 390R, 390G, and 390B are coated along side by side directions. Accordingly, the discharge spaces coated with the adjacent red phosphor layers 390R, 390G, and 390B are in communication with each other due to the formation of the first to third openings 383R, 383G, and 383B.

As described above, the first, second, and third openings 383R, 383G, and 383B are sequentially formed of red, green, and blue phosphor layers 390R in adjacent discharge spaces along a direction parallel to the direction in which the address electrodes 360 are disposed. (390G) 390B opens a central portion of the horizontal partition 381 that partitions the discharge space coated with a predetermined size to form a structure in which one end of the substrate 320 is connected to the other end.

First to third openings 383R, 383G, and 383B are formed in the horizontal partition 381 that partitions the discharge space coated with the red, green, and blue phosphor layers 390R, 390G, and 390B. Therefore, it is possible to smoothly discharge the impure gas remaining in the panel assembly during the vacuum evacuation, thereby reducing the discharge failure phenomenon.

As described above, the plasma display panel of the present invention can obtain the following effects.

In order to achieve the white balance, the first to third openings are formed in a part of the partition partitioning the discharge space coated with the red, green, and blue phosphor layers, so that the partition partitioning the discharge space coated with the red phosphor layer is least. The barrier rib coating the positive phosphor layer, the partition partitioning the discharge space coated with the green phosphor layer coated a relatively larger amount of the phosphor layer than the red phosphor layer, and the partition partition partitioning the discharge space coated with the blue phosphor layer. The white balance may be adjusted by coating a relatively large amount of the phosphor layer as compared to the green phosphor layer.

In addition, by providing the partition walls in which the first to third openings are formed, the passage of the impure gas is formed during the vacuum exhaust, thereby improving the exhaust efficiency.

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.

Claims (8)

A first substrate; A second substrate disposed to face the first substrate; An electrode disposed between the first and second substrates to generate a discharge; A partition wall disposed between the first and second substrates, the first partition wall and the second partition wall being coupled to each other to form a lattice structure, and partitioning a discharge space inside the first and second partition walls; And It includes a red, blue and green phosphor layer coated for each discharge space, The partition wall Part of which is removed so that the discharge space coated with the red phosphor layer is larger than the discharge space coated with the green phosphor layer, and the discharge space coated with the green phosphor layer is larger than the discharge space coated with the blue phosphor layer. An additional plasma display panel. delete  The method of claim 1, wherein the opening portion And a discharge space coated with the red, blue, and green phosphor layers. The method of claim 1, wherein the opening portion And a space formed by removing a portion of the central portion of the first partition wall disposed for each of the discharge spaces coated with the red, green, and blue phosphor layers along a direction parallel to the address electrode. A first substrate; A sustain electrode having a bus electrode formed on the first substrate and an XY electrode disposed in the discharge space from the bus electrode; A front dielectric layer filling the sustain electrode; A protective film layer coated on a surface of the front dielectric layer; A second substrate disposed to face the first substrate; An address electrode formed on the second substrate; A back dielectric layer filling the address electrode; A partition wall disposed between the first and second substrates, the first partition wall and the second partition wall being coupled to each other to form a lattice structure, and partitioning a discharge space inside the first and second partition walls; Red, blue and green phosphor layers coated in the discharge spaces; And The discharge space is formed on the partition wall partitioning the discharge space coated with the phosphor layer, the discharge space coated with the red phosphor layer is larger than the discharge space coated with the green phosphor layer, the discharge space coated with the green phosphor layer is And an opening in which a part of the partition wall is removed such that a blue phosphor layer is larger than a coated discharge space. delete  The method of claim 5, wherein the opening portion And a discharge space coated with the red, blue, and green phosphor layers. The method of claim 5, wherein the opening portion And a space formed by removing a portion of the central portion of the first partition wall disposed for each of the discharge spaces coated with the red, green, and blue phosphor layers along a direction parallel to the address electrode.

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