KR20070013149A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to increase discharge efficiency by forming a vent pass on a barrier rib toward an air vent and to increase an area applied by a phosphor, thereby increase luminance. A plasma display panel includes a rear substrate(600) having an air vent(10), and a barrier rib forming an air exhausting pass toward the air vent. An end of the barrier rib is bent at a certain angle relative to the air vent. The barrier rib has plural open-and close-type barrier ribs(610,620), in which at least one close-type barrier rib is formed on a center portion of the rear substrate, and at least one open-type barrier rib(630a,630b) is formed on an edge of the rear substrate.

Description

Plasma Display Panel {Plasma Display Panel}

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

2 is an enlarged view illustrating a barrier rib structure of a conventional plasma display panel.

3 is an enlarged view illustrating a barrier rib structure of a conventional plasma display panel.

4 is a plan view showing a discharge cell arrangement structure of a plasma display panel.

5 is a conceptual diagram for conceptually explaining a portion where a screen of a plasma display panel is displayed.

6 is a plan view illustrating a rear panel of a plasma display panel having a partition structure according to an exemplary embodiment of the present invention.

FIG. 7 is an enlarged view of the end of an open bulkhead formed near the exhaust port in FIG. 6; FIG.

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

10: exhaust port 600: rear substrate

610, 620: closed bulkhead 630a, 630b: open bulkhead

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having open and closed partitions.

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.

In the conventional plasma display panel having such a discharge cell structure, the partition wall 112 is formed to separate phosphors emitting colors of R (red), G (green), and B (blue), and thus, electrical, It plays a role of preventing optical crosstalk, and the general shape of such a partition is shown in FIG. 2.

2 is an enlarged view illustrating a barrier rib structure of a conventional plasma display panel.

As shown in FIG. 2, the partition walls of the plasma display panel are arranged in a stripe shape while being perpendicular to the sustain electrode formed of the transparent electrode a and the bus electrode b of FIG. 1.

Such a stripe-type barrier rib structure has a simple manufacturing process, but there is a problem in that visible light generated during discharge leaks in the stripe direction of the barrier rib, and phosphor printing and exhausting are easy, but misdischarge and phosphor coating area affecting adjacent cells are small. There is a problem.

Another partition wall structure generally used to compensate for this problem is shown in FIG. 3.

3 is an enlarged view illustrating a barrier rib structure of a conventional plasma display panel.

As shown in FIG. 3, the grid-type barrier rib structure of the conventional plasma display panel is horizontal or vertical to the sustain electrode formed of the transparent electrode a and the bus electrode b of FIG. 1. Arranged in shape.

Such a lattice-shaped partition wall structure can designate each color cell, thereby improving luminance, blocking leakage light, and preventing crosstalk in all directions.

However, the lattice-shaped partition wall structure has a problem that the luminance is increased because the influence of the adjacent cells is small and the coating area of the phosphor is large, but there is a problem in that the exhaust is not good.

That is, in manufacturing a plasma display panel, a front panel in which electrodes and a dielectric are sequentially formed, and a rear panel in which electrodes, a dielectric, a partition, and a phosphor are sequentially formed are bonded to each other and sealed, and then the inside of the panel is evacuated. After the exhaust is completed, an inert gas is sealed into the panel.

At this time, the inside of the panel is evacuated to remove impurities such as moisture adsorbed on the wall surface, and the internal gas is sucked by the vacuum pump from the exhaust port provided on the back side while the substrate is heated.

However, in such an exhaust treatment process, the partition wall impedes the smooth ventilation of the gas in the discharge space, and this causes the exhaust treatment process to take a long time, in particular, there is a problem that impurities remain in the area far away from the exhaust port.

When the inside of the panel is insufficiently cleaned, there is a problem in that the discharge gas encapsulated later and the air and impurities remaining in the panel are mixed, so that the discharge gas composition is changed and the display operation becomes unstable.

Accordingly, an object of the present invention is to provide a plasma display panel in which an exhaust path is formed so that a partition wall faces an exhaust port.

The plasma display panel for achieving the object of the present invention is characterized in that it comprises a rear substrate formed with an exhaust port, the partition wall forming the exhaust path toward the exhaust port.

The end of the partition is bent to have a predetermined angle toward the exhaust port.

Here, the partition wall includes a plurality of open and closed partitions, a closed partition is formed in the center portion of the rear substrate, characterized in that the open partition is formed in the peripheral portion.

In this case, the open barrier rib is formed as a part of the dummy cell.

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.

4 is a plan view illustrating a discharge cell arrangement structure of a plasma display panel.

As shown in FIG. 4, the discharge cells of the plasma display panel are configured at the intersections of the scan electrode lines Y1 to Yn, the sustain electrode lines Z1 to Zn, and the data electrode lines X1 to Xn. .

The scan electrode lines Y1 to Yn supply scan pulses and sustain pulses so that the discharge cells are scanned line by line and the discharges are maintained in the discharge cells.

The sustain electrode lines Z1 to Zn commonly supply a sustain pulse to maintain the discharge in the discharge cells together with the scan electrode lines Y1 to Yn.

 The data electrode lines X1 to Xn supply data pulses synchronized with the scan pulse on a line basis to select discharge cells for which discharge is to be maintained according to a logic value of the data pulses.

As described above, discharge cells of the plasma display panel having the structure are formed on the effective surface and the invalid surface.

5 is a conceptual diagram for conceptually explaining a portion where a screen of a plasma display panel is displayed.

As shown in FIG. 5, the plasma display panel is formed of an effective surface on which a screen is displayed and an invalid surface on which the screen is not displayed.

Here, a phosphor is coated on the effective surface to form a main cell for displaying an image during driving.

In addition, a dummy cell is formed on the ineffective surface, in which a phosphor layer is not generally formed or a driving voltage is not applied, so that a discharge for displaying an image does not occur during driving.

However, a phosphor layer may also be formed or a driving voltage may be applied to the dummy cell. Of course, no driving voltage is applied to the dummy cell in which the phosphor layer is formed. For example, a sustain voltage is alternately applied to a scan or sustain electrode of a dummy cell so that a phosphor layer is not formed so that light for displaying an image does not occur, but the dummy cell is driven by a driving voltage such as the sustain voltage as described above. A predetermined amount of wall charges is formed in the interior.

As described above, the partition walls formed on the main cell and the dummy cell are formed to have different shapes.

6 is a plan view illustrating a rear panel of a plasma display panel having a barrier rib structure according to an exemplary embodiment of the present invention.

As shown in FIG. 6, the plasma display panel is formed on the rear substrate 600 and the rear substrate 600 on which the exhaust port 10 is formed, and includes a plurality of open type 630a and 630b and closed partition walls that define a discharge space. 610 and 620.

First, the exhaust port 10 is formed on the rear substrate 600 to exhaust impurities in the panel.

The closed barrier ribs 610 and 620 are formed as well type barrier ribs and are arranged in a lattice shape on the rear substrate 600. In this case, the closed partitions 610 and 620 include a main cell 610 and a dummy cell 620.

The open barrier ribs 630a and 630b are formed as stripe-type barrier ribs, and are formed as vertical 630a and horizontal barrier ribs 630b on the rear substrate 600. At this time, the open barrier ribs 630a and 630b are all formed of dummy cells.

As such, in the present invention, the closed barrier ribs 610 and 620 and the open barrier ribs 630a and 630b are formed together on the rear substrate 600.

Looking at the operation according to an embodiment of the present invention configured as described above are as follows.

First, in manufacturing a plasma display panel, a front panel in which electrodes and a dielectric are sequentially formed, and a rear panel in which electrodes, a dielectric, a partition, and a phosphor are sequentially formed are bonded to each other and sealed, and then the inside of the panel is exhausted. After completion, the inert gas is sealed into the panel.

At this time, the inside of the panel is evacuated to remove impurities such as moisture adsorbed on the wall surface, and the internal gas is sucked out by the vacuum pump from the exhaust port 10 provided on the back side while the substrate is heated. .

In addition, impurities generated inside the panel are easily discharged due to the partition structure according to the exemplary embodiment of the present invention.

In more detail, the closed partitions 610 and 620 are arranged in a lattice or well shape on the rear substrate 600, and form a structure in which the top, bottom, left and right sides are all closed by a well type partition.

Here, the closed barrier ribs 610 and 620 are formed in the center portion of the rear substrate 600, and are formed in a shape surrounding the open barrier ribs 630a and 630b.

Here, one ends of the open barrier ribs 630a and 630b formed at the exhaust port 10 will be described with reference to FIG. 7.

FIG. 7 is an enlarged view illustrating an end portion of an open partition wall formed near the exhaust port in FIG. 6.

As shown in FIG. 7, one end of the open barrier ribs 630a and 630b forms a predetermined exhaust path toward the exhaust port 10.

That is, the partition walls 630b of the open barrier ribs 630a and 630b are horizontally formed by a predetermined distance of the exhaust port 10 of the rear substrate 600, and then, one end close to the exhaust port 10 is exhaust port 10. The path is formed to have a predetermined angle so as to face.

In addition, the partition walls 630b of the open barrier ribs 630a and 630b are vertically formed by a predetermined distance of the exhaust port 10 of the rear substrate 600, and then one end thereof close to the exhaust port 10 is exhaust port 10. It is bent to have a predetermined angle toward to form a path.

Here, although only one or one line of the dummy cells of the closed barrier ribs 610 and 620 is left, one, and one line, respectively, the rest of the dummy cells has been described only for forming the open barrier ribs 630a and 630b, but the present invention is not limited thereto.

That is, the discharge cells of the plasma display panel and the dummy cells may be formed by leaving two or more lines of dummy cells up, down, left, and right of the closed barrier ribs 610 and 620 and forming the remaining dummy cells as the open barrier ribs 630a and 630b. Various changes are possible as long as they do not interfere with the role.

In addition, although only the case where the closed partitions 610 and 620 are formed in the center has been described herein, the present invention is not limited thereto, and an open partition may be formed in the center.

In addition, although the closed barrier ribs 610 and 620 have been described with only the grid type barrier ribs and the open barrier ribs 630a and 630b being stripe type, the present invention is not limited thereto. It is possible.

As such, the closed barrier ribs 610 and 620 may be formed at the center of the rear substrate 600 to increase the coating area of the phosphor to improve luminance.

In addition, by forming the open barrier ribs 630a and 630b at the edge of the rear substrate 600 and by forming an exhaust path bent to have a predetermined angle at the end portion facing the exhaust port 10, the exhaust gas is smoothly injected before the discharge gas is injected. It can be done.

As described above in detail, the present invention has the effect of improving the exhaust characteristics by forming the exhaust path so that the partition wall faces the exhaust port.

In addition, when the open and closed partitions are used together, there is an effect of increasing the phosphor coating area to improve the brightness.

Claims (3)

A rear substrate on which an exhaust port is formed; A partition wall defining an exhaust path facing the exhaust port; Plasma display panel comprising a. The method of claim 1, An end portion of the partition wall is bent to have a predetermined angle in the direction of the exhaust port. The method of claim 1, The partition includes a plurality of open and closed partitions, At least one closed barrier rib is formed at a central portion of the rear substrate, and at least one open barrier rib is formed at an outer portion of the rear substrate.

Images