KR20020090389A - Plasma display panel - Google Patents

Abstract

PURPOSE: A plasma display panel is provided to enhance luminance and efficiency and prevent a mis-discharge between neighboring cells by increasing an area of a barrier rib. CONSTITUTION: A data electrode(52X) is formed on a lower substrate(60). A lower dielectric layer(62) and a barrier rib(64) are formed on the lower substrate(60). A fluorescent material is coated on surfaces of the lower substrate(60) and the barrier rib(64). The fluorescent material is excited by ultraviolet rays. The barrier ribs(64) are used for preventing a leaking phenomenon of visible rays and the ultraviolet rays to adjacent discharge cells. A scan/sustain electrode(52Y) and a common sustain electrode(52Z) are formed on the upper substrate(50). An upper dielectric layer and a protective layer(56) are formed on the upper substrate(50). The upper dielectric layer and the protective layer(56) are used for storing wall charges. The protective layer(56) is used for preventing a damage of the upper dielectric layer(54) and enhance emission efficiency of the secondary electrons. A discharge space is formed among the upper and the lower substrates(50,60) and the barrier rib(64). An inert gas is inserted into the discharge space. The barrier rib(64) is formed with a main barrier rib(64A) and a vertical barrier rib(64B).

Description

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 for facilitating exhaust and preventing erroneous discharge.

Recently, liquid crystal displays (hereinafter referred to as "LCD"), field emission displays (hereinafter referred to as "FED") and plasma display panels (hereinafter referred to as "PDP") Flat panel display devices such as) have been actively developed. The PDP emits a phosphor by 147 nm ultraviolet rays generated when the He + Xe or Ne + Xe inert mixed gas is discharged, thereby displaying an image including characters or graphics. Such a PDP is not only thin and large in size, but also simple in structure, thereby making it easy to manufacture. In addition, it has the advantage that the brightness and luminous efficiency is higher than other flat display devices. Due to these advantages, research on PDP is being actively conducted.

The three-electrode AC surface discharge type PDP has advantages of low voltage driving and long life because wall charges are accumulated on the surface during discharge and protect the electrodes from sputtering caused by the discharge.

FIG. 1 is a perspective view illustrating a conventional AC three-electrode PDP, and FIG. 2 is a plan view illustrating a stripe-type partition wall structure illustrated in FIG. 1.

1 and 2, the discharge cell of the PDP is formed by the bonding of the upper substrate 10 and the lower substrate 20. The scan / hold electrode 12Y and the common sustain electrode 12Z formed on the upper substrate 10 and the data electrode 12X formed on the lower substrate 20 are provided.

An upper dielectric layer 14 and a passivation layer 16 are formed on the upper substrate 10 on which the scan / hold electrode 12Y and the common sustain electrode 12Z are formed. The upper dielectric layer 14 accumulates wall charges generated during plasma discharge. The protective layer 16 prevents damage to the upper dielectric layer 14 due to sputtering generated during plasma discharge, and increases emission efficiency of secondary electrons.

The lower dielectric layer 22 and the partition wall 24 are formed on the lower substrate 18 on which the data electrode 12X is formed. The phosphor 26 is applied between the lower dielectric layer 22 and the partition wall 24. The phosphor 26 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue. Inert gas for gas discharge is injected into the discharge space provided between the upper and lower plates 10 and 20 and the partition wall 24. The partition wall 24 is formed in parallel with the data electrode 12X to prevent ultraviolet rays and visible rays generated by the discharge from leaking to the adjacent discharge cells.

The partition structure of the AC surface discharge PDP is divided into a stripe type as shown in FIG. 2 and a square type as shown in FIG. 3.

In the case of the stripe-type partition wall structure 24, the exhaust gas is easy to exhaust, but the phosphor coating area is small, and thus, the luminance and the efficiency are low. In order to increase such luminance and efficiency, the coating area of the phosphor should be increased. To this end, the rectangular barrier rib structure 30 may increase the coating area of the phosphor to increase luminance. In the stripe-shaped partition wall structure 24, an error discharge occurs due to interference between adjacent cells, and the rectangular partition wall structure 30 prevents the error discharge.

However, the rectangular partition wall structure 30 requires a considerable exhaust time because of poor exhaust conductance. Accordingly, the rectangular partition wall structure 30 not only causes a decrease in yield, but also has a problem in that the exhaust gas is not well discharged even for a long time.

In order to solve such a problem, a PDP having a fish bon type partition structure as shown in FIG. 4 has been proposed.

Referring to FIG. 4, in the fishbone type barrier rib structure 40, in the rectangular barrier rib structure 30, the barrier rib 40a parallel to the scan / hold electrode 12Y and the common sustain electrode 12Z is disposed at the center of each discharge cell. Open The barrier rib 40a is discharged to some extent because the discharge cells are connected to each other, but there is a problem that the discharge cells between the adjacent cells cannot be completely prevented.

Accordingly, an object of the present invention is to provide a plasma display panel which can increase the brightness and efficiency by increasing the area of the partition wall.

Another object of the present invention is to provide a plasma display panel which can facilitate exhaust and prevent erroneous discharge.

1 is a perspective view showing a plasma display panel having a conventional stripe-type partition wall structure.

FIG. 2 is a plan view of the plasma display panel shown in FIG. 1; FIG.

3 is a plan view showing a plasma display panel having a conventional rectangular partition structure.

4 is a plan view showing a plasma display panel having a conventional fishbone type partition wall structure.

5 is a perspective view illustrating a plasma display panel including a partition wall according to a first embodiment of the present invention.

FIG. 6 is a plan view of the plasma display panel shown in FIG. 5; FIG.

7 is a perspective view illustrating a plasma display panel including a partition wall according to a second embodiment of the present invention.

FIG. 8 is a plan view illustrating the plasma display panel shown in FIG. 7; FIG.

9 is a perspective view illustrating a plasma display panel including a partition wall according to a third exemplary embodiment of the present invention.

FIG. 10 is a plan view of the plasma display panel shown in FIG. 9; FIG.

FIG. 11 is a perspective view illustrating a plasma display panel including a partition wall according to a fourth exemplary embodiment of the present invention. FIG.

12 is a plan view of the plasma display panel shown in FIG. 11;

<Description of Symbols for Main Parts of Drawings>

10,50: upper substrate 12Y, 12Z, 52Y, 52Z: sustain electrode

12X, 52X: Data electrode 14,22,54: Dielectric layer

16,56: protective film 20,60: lower substrate

24,64,74,84,94: bulkhead 26,66: phosphor

82: auxiliary bulkhead

In order to achieve the above object, the plasma display panel of the present invention is composed of a plurality of discharge cells having a data electrode and a sustain electrode pair, the plasma display panel comprising a partition for dividing each discharge cell in the vertical or horizontal direction, And an exhaust passage formed in the partition wall at intervals for separating discharge cells adjacent to each other in a vertical direction in the sustain electrode direction.

Other objects and features of the present invention in addition to the above object will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 5 and 12.

FIG. 5 is a perspective view illustrating a PDP including a partition wall according to a first embodiment of the present invention, and FIG. 6 is a plan view illustrating the partition structure shown in FIG. 5.

5 and 6, in the discharge cell of the PDP according to the present invention, the lower dielectric layer 62 and the partition wall 64 are formed on the lower substrate 60 on which the data electrode 52X is formed. Phosphors (not shown) are applied to the surfaces of the lower substrate 60 and the partition wall 64. The phosphor is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue. The partition 64 prevents ultraviolet rays and visible rays generated by the discharge from leaking into adjacent discharge cells. An upper dielectric layer 54 and a passivation layer 56 are formed on the upper substrate 50 where the scan / sustain electrode 52Y and the common sustain electrode 52Z are formed. In this case, the scan / sustain electrode 52Y and the common sustain electrode 52Z may be interchanged. The upper dielectric layer 54 and the lower dielectric layer 62 accumulate wall charges generated during plasma discharge. The passivation layer 56 prevents damage to the upper dielectric layer 54 by sputtering generated during plasma discharge and increases emission efficiency of secondary electrons. Inert gas for gas discharge is injected into the discharge space provided between the upper and lower plates 50 and 60 and the partition wall 64.

The partition 64 is composed of a main partition 64A and a vertical partition 64B extending vertically from the main partition 64A. The main partition 64A is formed parallel to the scan / sustain electrode 52Y and the common sustain electrode 52Z. The partition 64 is formed such that discharge cells vertically adjacent to each other are opened. In this case, the vertical partition 64B is formed with the vertical partition 64B of the vertically adjacent discharge cells interposed with a predetermined distance d1. Here, gas is injected or exhausted into the discharge space through the open space at a predetermined interval.

The scan / sustain electrode 52Y and the common sustain electrode 52Z are formed close to the partition 64. That is, the interval d2 between the scan / hold electrode 52Y and the common sustain electrode 52Z formed for each discharge cell is the gap between the partition 64 and the scan / hold electrode 52Y and the common sustain electrode 52Z. Is greater than twice (d3 * 2). As the distance d3 between the partition 64 and the scan / hold electrode 52Y and the common sustain electrode 52Z approaches, the amount of light emitted from the phosphor coated on the partition 64 increases. That is, the light efficiency is increased and the brightness is increased. In addition, since the partition 64 has a close distance between the scan / sustain electrode 52Y and the common sustain electrode 52Z, plasma discharge occurs near the partition 64. In this case, the miscellaneous discharge is reduced by making the partition 64 a distance between discharge cells.

FIG. 7 is a perspective view illustrating a PDP according to a second embodiment of the present invention, and FIG. 8 is a plan view illustrating a partition wall illustrated in FIG. 7.

7 and 8, in the PDP according to the present invention, the partition wall 74 includes a main partition wall 74A and a vertical partition wall 74B extending vertically from the main partition wall 74A. The main partition 74A is formed parallel to the scan / sustain electrode 52Y and the common sustain electrode 52Z. The vertical bulkhead 74B is formed with the main partition 74A of the vertically adjacent discharge cells interposed with a predetermined distance d1. Here, gas is injected or exhausted into the discharge space through the open space at a predetermined interval.

Since the partition 74 closes the discharge cell space adjacent to the partition 64 of the first embodiment, gas injection or exhaust is not smooth. However, the scan / sustain electrode 52Y and the common sustain electrode 52Z pass through the center portion of the partition wall 74 to generate discharges having equal intervals. As a result, the luminance is uniformly distributed over the entire display surface. In addition, since the partition wall 74 minimizes interference between discharge cells, erroneous discharge is reduced.

At this time, the distance d2 between the common sustain electrode 52Z and the partition wall 74 is larger than the distance d3 between the scan / hold electrode 52Y and the partition wall 74. As the distance between the partition wall 74 and the scan / hold electrode 52Y and the common sustain electrode 52Z approaches, the amount of light emitted from the phosphor coated on the partition wall 74 increases. That is, the light efficiency is increased and the brightness is increased.

FIG. 9 is a perspective view illustrating a PDP including a partition wall according to a third embodiment of the present invention, and FIG. 10 is a plan view illustrating the partition wall shown in FIG. 9.

9 and 10, the partition wall 84 includes a main partition wall 84A, a vertical partition wall 84B extending vertically from the main partition wall 84A, and an auxiliary partition wall 82. The main partition wall 84A is formed in parallel with the scan / sustain electrode 52Y and the common sustain electrode 52Z. The vertical partition wall 84B is formed with the vertical partition wall 84B and the auxiliary partition wall 84A of the vertically adjacent discharge cells interposed therebetween. The auxiliary bulkhead 82 is formed to have a predetermined gap between the vertical bulkheads 84B in a stripe shape. Gas is injected or exhausted into the discharge space through the open space at a predetermined interval. This is to facilitate gas injection or exhaust. The auxiliary partition wall 82 minimizes mis-discharge between adjacent discharge cells. In addition, the auxiliary partition wall 82 increases the area of the entire partition wall, thereby increasing the amount of phosphor applied. Therefore, the amount of visible light emitted is increased and the luminance is increased.

FIG. 11 is a perspective view illustrating a PDP including a partition wall according to a fourth embodiment of the present invention, and FIG. 12 is a plan view illustrating the partition wall shown in FIG. 11.

Referring to FIGS. 11 and 12, the partition wall 94 is formed in a zigzag shape, and is formed to alternately block discharge cells horizontally adjacent to each other and to alternately block up and down. The partition 94 is formed in parallel with the scan / sustain electrode 52Y and the common sustain electrode 52Z. The partition 94 is formed to have a predetermined distance d1 between the partition walls 94 to facilitate gas injection or exhaust. The partition wall 94 minimizes interference between discharge cells to reduce mis-discharge.

As described above, the plasma display panel according to the present invention can improve luminance. In addition, gas injection and exhaust can be facilitated, and erroneous discharges between adjacent discharge cells can be reduced.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (6)

A plasma display panel comprising a plurality of discharge cells having a data electrode and a sustain electrode pair, and including a partition wall that divides each discharge cell vertically and / or left and right. And an exhaust path formed in the partition wall at intervals for distinguishing discharge cells adjacent to each other in a vertical direction in the sustain electrode direction. The method of claim 1, The partition wall Vertical barrier ribs formed between discharge cells in the data electrode direction; And a horizontal barrier rib formed in the direction of the pair of sustain electrodes, wherein the horizontal barrier rib is formed only on or below adjacent upper and lower discharge cells to form an exhaust path. The method of claim 2, And the horizontal partition wall is formed only on the upper part of the discharge cell, and the exhaust path is formed between adjacent discharge cells. The method of claim 2, And the horizontal bulkhead is formed in the upper and lower portions of the upper and lower adjacent discharge cells in order every other discharge cells, and the exhaust passage is formed every other adjacent discharge cells. The method of claim 2, And the horizontal bulkhead is formed in every upper and lower part of the discharge cells adjacent to the left and right adjacent to each other in order so that the exhaust passage is formed between the adjacent discharge cells. The method of claim 4, wherein And a straight auxiliary partition wall in the exhaust path in the direction of the sustain electrode.