KR20040058632A - Plasma display panel having getter within - Google Patents

Abstract

PURPOSE: A plasma display panel is provided to lengthen the useful life of the panel by effectively removing impurity gases generated from an effective screen. CONSTITUTION: A plasma display panel comprises a front substrate(10) and a rear substrate(20) opposed each other with a gap formed therebetween; a plurality of address electrodes(21) arranged on the surface of the rear substrate opposed to the front substrate; a plurality of discharge sustain electrodes(12) arranged on the surface of the front substrate opposed to the rear substrate, in the direction crossing the address electrodes; a barrier rib(25) interposed between the front substrate and the rear substrate so as to define a plurality of discharge cells(27R,27G,27B), wherein the discharge cells form a display area in which address electrodes and the discharge sustain electrodes cross with each other and bring about a display discharge, and a non-display area arranged in the vicinity of the display area; and a getter(32) arranged in the non-display area so as to remove impurity gases.

Description

Plasma display panel with built-in getter {PLASMA DISPLAY PANEL HAVING GETTER WITHIN}

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 in which a getter is installed to remove impurity gas generated inside the panel during operation.

In general, a plasma display panel (hereinafter referred to as a 'PDP') is a display device that realizes a predetermined image by exciting phosphors by ultraviolet rays generated by gas discharge. Is in the spotlight.

Referring to FIG. 6, in the conventional general PDP structure, an address electrode 81 is formed along one direction (x direction in the drawing) on the back substrate 80, and the back substrate 80 is covered with the address electrode 81. The dielectric layer 83 is formed in front of the. A barrier rib 85 of a line pattern is formed on the dielectric layer 83 so as to be disposed between each of the address electrodes 81. The red, green, and blue colors of the red, green, and blue colors are formed between the barrier ribs 85. The phosphor layer 87 is formed.

One surface of the front substrate 90 facing the rear substrate 80 includes a pair of transparent electrodes 92 and a bus electrode 93 in a direction crossing the address electrode 81 (y direction in the drawing). The discharge sustain electrode 94 is formed, and the dielectric layer 96 and the MgO passivation layer 98 are formed on the entire front substrate 90 while covering the discharge sustain electrode 94.

The point where the address electrode 81 on the rear substrate 80 and the discharge sustain electrode 94 on the front substrate 90 intersect becomes a portion constituting the discharge cell.

An address voltage Va is applied between the address electrode 81 and the discharge sustain electrode 94 to perform address discharge, and a sustain voltage Vs is applied between the pair of discharge sustain electrodes 94 to sustain discharge. At this time, gas discharge occurs in each discharge cell, and the vacuum ultraviolet rays generated together excite the corresponding phosphor to emit visible light through the transparent front substrate 90 to implement the screen of the PDP.

However, when one pixel or a region in the display area is discharged for a long time and terminated, it may be found that the brightness is different from that of the pixels around the display area. This is because the MgO protective film 98 and the phosphor layer 87 are contaminated by residual gas and exhaust gas in the panel after discharge. Such contamination adversely affects the lifetime characteristics of panels in the long run. Therefore, the getter is adopted to remove the impurity gas which exists in the panel and causes the above contamination.

7 is a plan view schematically illustrating a position and a shape in which a getter is installed in a conventional plasma display panel.

Referring to FIG. 7, in the conventional PDP, getters 104, 106, and 108 are provided to be adjacent to the edge of the effective screen unit 102. These getters 104, 106, and 108 are installed to have a shape such as a pill type 104, a strip type 106, or a paste type 108, and the effective screen portion of the PDP. 102 serves to remove the impurity gas generated inside and discharged to the edge along the passage formed by the partition wall. A related art is the getter system for plasma display disclosed in US Pat. No. 6,472,819.

However, in a PDP having such a getter structure, impurity gas is generated in the effective display unit 102, and the getters 104, 106 and 108 are adjacent to the edges of the effective display unit 102. There is a problem in that the efficiency is not properly performed.

In addition, since the impurity gas generated in the phosphor layer or the partition wall reaches the getters 104, 106, and 108 through other discharge cells, the impurity gases may still contaminate other discharge spaces while they are moving.

The present invention was devised to solve the above problems, and an object thereof is to effectively remove impurities in an effective display portion such as a phosphor layer, a partition, or a protective film by installing a getter in the effective display portion of a panel. It is to provide a plasma display panel which can improve its life.

1 is a partially exploded perspective view illustrating a plasma display panel according to a first embodiment of the present invention.

2 is a partial plan view showing a plasma display panel according to a first embodiment of the present invention.

3 is a partial plan view showing a plasma display panel according to a second embodiment of the present invention.

4 is a partial plan view of a plasma display panel according to a third exemplary embodiment of the present invention.

5 is a partial plan view of a plasma display panel according to a fourth embodiment of the present invention.

6 is a partially cut perspective view of a conventional plasma display panel.

7 is a plan view schematically illustrating a position and a shape in which a getter is installed in a conventional plasma display panel.

* Description of the symbols for the main parts of the drawings *

10: front substrate 12,42,52,62: discharge sustaining electrode

12a: transparent electrode 12b: bus electrode

20: back substrate 21: address electrode

23: dielectric layer 25, 45, 55, 65: bulkhead

25a, 45a, 55a: first partition member 25b, 45b, 55b: second partition member

27R, 27G, 27B: discharge cell 29R, 29G, 29B: phosphor layer

30,46,56,66: Non-display area 32,48,58,68: Getter

43,53,63: display area

In order to achieve the above object, a plasma display panel according to the present invention includes: a front substrate and a rear substrate disposed to face each other at a predetermined interval; A plurality of address electrodes which are formed in parallel with each other along one direction of the rear substrate on a surface opposite to the front substrate among the rear substrates; A plurality of discharge sustaining electrodes formed on a surface of the front substrate opposite to the rear substrate in a direction crossing the address electrodes; And a partition wall disposed between the front substrate and the rear substrate to partition a plurality of divided spaces. At this time, a space causing display discharge by intersecting the address electrode and the discharge sustaining electrode among the divided spaces partitioned by the partition wall is called a display area, and a space which is disposed adjacent to the display area and does not cause display discharge is not displayed. When referred to as an area, a getter for removing impurity gas is provided in the non-display area.

The discharge sustaining electrodes are paired in pairs in a direction crossing the address electrodes so as to correspond to the display areas, and the getters are provided in non-display areas between adjacent discharge sustaining electrode pairs.

In the case of the plasma display panel according to the first embodiment of the present invention, the partition wall includes: a first partition member in which a plurality of unit partitions are arranged side by side at a predetermined interval along a direction parallel to the address electrode; And a second partition member formed in a shape between the first partition members and intersecting with the address electrode direction. Here, the display area is partitioned by a pair of first partition wall members adjacent to each other and a pair of second partition wall members adjacent to each other, and by a pair of second partition wall members adjacent to each other in a direction crossing the address electrode. The non-display area may be partitioned and a getter may be installed in the non-display area.

Preferably, the height of the second partition member is lower than the height of the first partition member.

In the case of the plasma display panel according to the second embodiment of the present invention, the barrier rib is formed between a plurality of first barrier rib members extending in a direction crossing the address electrode in a direction parallel to the address electrode. One display area set including two partition members is formed, and a plurality of display area sets are arranged adjacent to each other and extend in a direction intersecting the address electrode with a predetermined distance between adjacent display area sets. A non-display area may be provided, and a getter may be installed in the non-display area.

It is preferable that each of the display area sets correspond to a pair of discharge sustaining electrodes formed on the front substrate.

In the case of the plasma display panel according to the third embodiment of the present invention, the partition wall includes a plurality of first partition members extending in parallel with the address electrode and a plurality of partition walls extending in a direction crossing the address electrode. The grid-shaped partition space is partitioned by two partition members, and the discharge sustaining electrode is formed along the second partition wall member, and alternately protrudes toward the inside of the adjacent partition space to form a display area. A non-display area may be provided in a space adjacent to the display area, and a getter may be provided in the non-display area.

Preferably, the protrusion is made of a transparent electrode.

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

1 is a partially exploded perspective view showing a plasma display panel according to a first embodiment of the present invention, Figure 2 is a partial plan view showing a plasma display panel according to a first embodiment of the present invention.

As shown in the drawing, the plasma display panel (hereinafter referred to as 'PDP') according to the first exemplary embodiment of the present invention is basically arranged with the front substrate 10 and the rear substrate 20 facing each other at a predetermined interval. A plurality of discharge cells 27R, 27G, 27B are partitioned, and an address electrode 21, a discharge sustain electrode 12, and the like are arranged in a space between the substrates 10 and 20 so as to cause plasma discharge.

Specifically, first, a plurality of address electrodes 21 are formed along one direction (x direction in the drawing) of the rear substrate 20 on the opposite surface of the rear substrate 20. The address electrodes 21 are formed parallel to each other while maintaining a predetermined distance from the neighboring address electrodes 21. A dielectric layer 23 is also formed on the back substrate 20 on which the address electrode 21 is formed. The dielectric layer 23 is formed on the entire surface of the substrate while covering the address electrode 21.

A partition wall 25 is formed on the top surface of the dielectric layer 23 to partition the plurality of discharge cells 27R, 27G, and 27B. In the present embodiment, the partition wall 25 includes the first partition wall member 25a and the second partition wall member 25b.

The first partition wall member 25a is disposed between the address electrodes 21 and 21 adjacent to each other, and has a predetermined length corresponding to each of the discharge cells 27R, 27G, and 27B in a direction parallel to the address electrode 21. Unit bulkheads having a vertical distance from each other are formed by being arranged. The second partition wall member 25b is formed in an X shape between the first partition wall members 25a to cross the direction of the address electrode 21.

The pair of second partition wall members 25b adjacent to each other in the direction parallel to the address electrode 21 (the x direction in the drawing) is adjacent to the pair of the neighboring electrodes in the direction orthogonal to the address electrode 21 (the y direction in the drawing). The discharge cells 27R, 27G, and 27B are partitioned in combination with the first partition wall member 25a. The discharge cells 27R, 27G, and 27B constitute a display area where the address electrode 21 and the discharge sustain electrode 12 cross each other to cause display discharge therein.

In addition, each branch of the second partition member 25b is connected to one end of the unit partition wall of the first partition member 25a to be coupled to the first partition member 25a. At this time, the address electrode 21 The divided space partitioned by a pair of neighboring second partition members 25b in a direction intersecting with (y direction in the drawing) constitutes a non-display area 30 which does not cause display discharge.

The first partition member 25a and the second partition member 25b constituting the partition wall 25 may have different heights, and preferably, the height h2 of the second partition member 25b may be defined. 1 It is formed lower than the height h1 of the partition member 25a. In this way, it is possible to smoothly discharge the discharge gas.

The non-display area 30 is provided with a getter 32 that can adsorb impurity gas generated in each of the discharge cells 27R, 27G, and 27B, which are display areas during plasma discharge. Therefore, when the discharge sustaining electrodes 12 are arranged in pairs to correspond to the respective discharge cells 27R, 27G, and 27B which are display areas, the getters 32 are adjacent to each other. Is provided in the non-display area 30 between them. The discharge sustaining electrode 12 is formed in a stripe shape and corresponds to a pair of bus electrodes 12b corresponding to each of the discharge cells 27R, 27G and 27B, and the discharge cells 27R, 27G and 27B from the bus electrodes 12b. It is made of a transparent electrode (12a) extending to the inside of the forming a protruding portion and a pair facing each other.

The getter 32 is made of zirconium (Zr) as a main component, and other additives may be added according to the purpose.

3 is a partial plan view showing a PDP according to a second embodiment of the present invention.

As shown, the PDP according to the present embodiment includes a plurality of display area sets 43 arranged adjacent to each other. The display area set 43 is partitioned by the partition wall 45, and the address electrode 21 is interposed between the pair of first partition wall members 45a extending in a direction crossing the address electrode 21. The plurality of second partition wall members 45b are arranged in a direction parallel to the one to form one display area set 43.

The plurality of display area sets 43 configured as described above are arranged to be adjacent to each other in the direction parallel to the address electrode 21, and at this time, the address areas have a predetermined interval between the pair of display area sets 43 adjacent to each other. The non-display area 46 extending in the direction crossing the electrode 21 is provided.

Each of the display area sets 43 corresponds to a pair of discharge sustaining electrodes 42 and 42 formed on a front substrate (not shown), and the non-display area 46 is generated in each of the display areas during plasma discharge. A getter 48 is provided which can adsorb impurity gas.

The getter 48 is formed in a paste shape along the non-display area 46. As the getter 48, a getter based on zirconium (Zr) is used, and other additives may be added according to the purpose.

4 is a partial plan view showing a PDP according to a third embodiment of the present invention.

As shown, the PDP according to the present embodiment includes a grid-shaped partition space partitioned by a plurality of partition walls 55. That is, the grid-shaped partition space includes a plurality of first partition members 55a extending in parallel with the address electrode 21 and a plurality of second extending in a direction crossing the address electrode 21. It is partitioned by the partition member 55b.

The divided spaces thus partitioned constitute the display area 53 or the non-display area 56. That is, the discharge sustaining electrode 52 is formed along the second partition wall member 55b and alternately protrudes toward the inside of the adjacent divided space to form the display area 53. ), A non-display area 56 is provided in the space adjacent to ().

The discharge sustain electrode 52 extends into the effective area 53 from the bus electrode 52b having a stripe shape along the second partition member 55b and from the bus electrode 52b to form a protrusion. The pair may be formed of a transparent electrode 52b formed to face each other.

The non-display area 56 is provided with a getter 58 that can adsorb impurity gas generated in each of the display areas during plasma discharge.

The getter 58 is made of zirconium (Zr) as a main component, and other additives may be added according to the purpose.

5 is a partial plan view showing a PDP according to a fourth embodiment of the present invention.

As shown, the PDP according to the present embodiment is formed with a partition wall 65 extending in parallel with the address electrode 21 in a long direction, paired in pairs along the direction crossing the address electrode 21. Discharge sustaining electrodes 62 and 62 are formed.

Thus, a portion of the divided space partitioned by the partition wall 65 that intersects with the pair of discharge sustaining electrodes 62, 62 constitutes the display area 63, and the pair of discharge sustaining electrodes 62, 62 adjacent to each other. The portion between the lines constituting the non-display area 66.

The non-display area 66 is provided with a getter 68 capable of absorbing impurity gas generated in each of the display areas during plasma discharge.

The getter 68 is made of zirconium (Zr) as a main component, and other additives may be added according to the purpose.

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 the scope of the invention.

As described above, according to the plasma display panel according to the present invention, by installing a getter in the effective screen portion of the panel, the residual image of the plasma display panel can be effectively removed by effectively removing the impurity gas generated in the effective screen portion such as the phosphor layer, the partition wall, or the protective film. It can improve the problem and improve the lifetime.

Therefore, the color characteristics of the plasma display panel can also be improved, the exhaust index can be shortened, and the bright room contrast ratio can be improved. In addition, there is an effect that can improve the reflectance of the effective screen portion.

Claims (8)

A front substrate and a rear substrate disposed to face each other at a predetermined interval; A plurality of address electrodes which are formed in parallel to each other along one direction of the rear substrate on a surface opposite to the front substrate among the rear substrates; A plurality of discharge sustaining electrodes formed on a surface of the front substrate opposite to the rear substrate in a direction crossing the address electrodes; And A partition wall disposed between the front substrate and the rear substrate to partition a plurality of divided spaces; Including, Among the divided spaces partitioned by the partition wall, a space causing display discharge by crossing the address electrode and the discharge sustaining electrode is called a display area, and a space which is disposed adjacent to the display area and does not cause display discharge is referred to as a non-display area. time, And a getter for removing impurity gas in the non-display area. The method of claim 1, The discharge sustaining electrodes are paired in pairs in a direction crossing the address electrodes so as to correspond to the display areas, and the getters are disposed in non-display areas between adjacent pairs of discharge sustaining electrodes. . The method of claim 1, The partition wall A first partition member in which a plurality of unit partitions are arranged side by side in up, down, left and right at regular intervals in a direction parallel to the address electrode; And A second barrier member formed in a shape between the first barrier members and intersecting the direction of the address electrode; Including, The display area is divided by a pair of first partition members adjacent to each other and a pair of second partition members neighboring each other, and the display area is divided by a pair of second partition members neighboring in a direction crossing the address electrode. The non-display area is partitioned And a getter in the non-display area. The method of claim 3, wherein And a height of the second partition wall member is lower than a height of the first partition wall member. The method of claim 1, The partition wall One display area set includes a plurality of second partition members formed in a direction parallel to the address electrodes between a pair of first partition members extending in a direction crossing the address electrodes, A plurality of display area sets are arranged adjacent to each other, and a non-display area is provided between the display area sets adjacent to each other and extends in a direction crossing the address electrode with a predetermined interval. Plasma display panel installed. The method of claim 5, wherein Wherein each set of display areas corresponds to a pair of discharge sustaining electrodes formed on the front substrate. The method of claim 1, The partition wall The lattice-shaped partition space is partitioned by a plurality of first partition members extending in a direction parallel to the address electrode and a plurality of second partition members extending in a direction crossing the address electrode. The discharge sustaining electrode is formed along the second partition wall member and alternately protrudes toward the inside of the adjacent divided space to form a display area. A non-display area is provided in a space adjacent the display area, and a getter is provided in the non-display area. The method of claim 7, wherein And a protrusion part formed of a transparent electrode.