KR100669466B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel that increases address discharge capability for discharge cells positioned in a region where a scan is to be performed later. The plasma display panel according to the present invention includes a first substrate having a display area set therebetween and disposed to face each other; A second substrate, address electrodes formed side by side in one direction on the first substrate, a partition wall disposed in a space between the first substrate and the second substrate and partitioning a plurality of discharge cells, and formed in each discharge cell The phosphor layer and display electrodes are formed on the second substrate in parallel with the address electrode. In this case, the display area is divided into a plurality of areas along the scan progress direction, and the address electrodes are formed with a larger width as the area where the scan is performed later.

Plasma, address electrode, display electrode, intermediate electrode, address discharge, sustain discharge, scan direction

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

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

2 is a plan view of a plasma display panel according to the present invention.

3 is a partially enlarged cross-sectional view of a plasma display panel according to a first embodiment of the present invention.

4 is a partially exploded perspective view illustrating an inside of a display area of a plasma display panel according to a second exemplary embodiment of the present invention.

5 is a partially enlarged cross-sectional view of a plasma display panel according to a second embodiment of the present invention.

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 electrode shape in order to ensure excellent address discharge capability of the entire panel.

In general, a plasma display panel (hereinafter referred to as a 'PDP') excites phosphors by vacuum ultra-violet emitted from a plasma obtained through gas discharge, and red, green, and blue colors generated at this time. A display device for implementing an image using the visible light.

In a typical AC PDP, address electrodes are formed on a rear substrate, a dielectric layer is formed on the entire rear substrate while covering the address electrodes, partition walls are formed between respective address electrodes on the dielectric layer, and red and white partitions are formed between the respective partition walls. Green and blue phosphor layers are formed. In addition, display electrodes are formed on one surface of the front substrate facing the rear substrate in a direction orthogonal to the address electrodes, and a dielectric layer and an MgO passivation layer are sequentially formed on the entire front substrate while covering the display electrodes.

Discharge cells are formed at the intersections of the address electrodes on the rear substrate and the pair of display electrodes on the front substrate, and millions of unit discharge cells are arranged in a matrix form within the PDP. At this time, the X electrode is used as the common electrode among the pair of display electrodes, the Y electrode is used as the reset and scan electrodes, and both the X electrode and the Y electrode are used during sustain discharge.

In the ADS method, which is widely used at present, positive electrode accumulates on the address electrode side due to a reset operation, electrons accumulate on the Y electrode side, and the address electrode and the Y electrode have a potential difference caused by an externally applied address pulse, scan pulse, and wall charge A discharge occurs between the X electrode and the Y electrode, and as a result, a wall charge is formed and changed into a state where sustain discharge is possible.

However, such an address method has a disadvantage in that the address discharge capability is deteriorated because the effect of the space charge is insufficient at the end portion compared to the portion where the scan starts. That is, when the PDP is viewed from the front, the address discharge becomes disadvantageous for the discharge cells located at the bottom of the screen. The decrease in the address discharge capability becomes a bigger problem as the PDP becomes larger and the resolution becomes higher.

Accordingly, an object of the present invention is to solve the above problems, and an object of the present invention is to compensate for a drop in address discharge capability for discharge cells located in a region where a scan is performed later, thereby ensuring excellent address discharge capability across the entire panel. It is to provide a plasma display panel that can be.

In order to achieve the above object, the present invention,

A plurality of discharges disposed in a space between the first substrate and the second substrate having the display area set therebetween, the address electrodes formed side by side in one direction on the first substrate, and the first substrate and the second substrate; A partition wall partitioning the cells, a phosphor layer formed in each discharge cell, and display electrodes formed side by side in a direction orthogonal to the address electrode on the second substrate, wherein the display area includes a plurality of regions along the scan progress direction; The address electrodes provide a plasma display panel having a larger width as a region where a scan is performed later.

The plasma display panel further includes an intermediate electrode positioned between the display electrodes corresponding to each discharge cell. At this time, the intermediate electrodes are formed with a larger width in the region where the scan is performed later.

In addition, the present invention, in order to achieve the above object,

A plurality of discharges disposed in a space between the first substrate and the second substrate, the display area being set to face each other, the address electrodes formed side by side in one direction on the first substrate, and the first substrate and the second substrate A partition wall partitioning the cells, a phosphor layer formed in each discharge cell, display electrodes formed side by side in a direction orthogonal to the address electrode on the second substrate, and positioned between the display electrodes corresponding to each discharge cell. The display area may include a plurality of intermediate electrodes, and the display area may be divided into a plurality of areas along a scan progress direction, and the intermediate electrodes may have a larger width as a region where a scan is performed later.

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

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

Referring to FIG. 1, a PDP according to the present invention is basically referred to as a first substrate 2 (hereinafter referred to as a "back substrate") and a second substrate 4 (hereinafter referred to as a "front substrate"). ) Are disposed to face each other at predetermined intervals, and a plurality of discharge cells 14R, 14G, and 14B are partitioned by the partition wall 10 in the space between the back substrate 2 and the front substrate 4.

In each of the discharge cells 14R, 14G, and 14B, phosphor layers 12R, 12G, and 12B, which absorb ultraviolet rays and emit visible light, are formed, and discharge gases (eg, xenon (Xe), neon, etc.) can cause plasma discharge. (Mixed gas including Ne) and the like.

Address electrodes 6 are formed along one direction (y-axis direction of the drawing) on the opposite surface of the rear substrate 2 from the front substrate 4, and the rear substrate 2 is covered while covering the address electrodes 6. Is formed on the first dielectric layer 8. The address electrodes 6 are arranged in parallel with each other while maintaining an interval corresponding to the other address electrodes 6 and the discharge cells.

A partition 10 partitioning the discharge cells 14R, 14G, and 14B is disposed on the first dielectric layer 8. In this embodiment, the partition wall 10 is formed to be orthogonal to the first partition member 10a and the first partition member 10a which are arranged in parallel with the address electrode 6 between each address electrode 6. And the second partition wall member 10b for partitioning the discharge cells 14R, 14G, and 14B into independent discharge spaces. The shape of the partition wall 10 is not limited to the lattice shape shown, but may be formed in a closed structure or stripe shape other than the lattice shape.

Each discharge cell 14R, 14G, 14B partitioned by the partition wall 10 has red, green, or blue phosphor layers 12R, 12G, over four sides of the partition wall 10 and the top surface of the first dielectric layer 8. 12B) is located.

The display electrodes 16 and 18 are formed on the opposite surface of the front substrate 4 to the rear substrate 2 along the direction orthogonal to the address electrode 6 (the x-axis direction in the drawing). The second dielectric layer 20 and the passivation layer 22 that are transparent to the entire front substrate 4 are formed while covering the portions 16 and 18. As the protective film 22, MgO which is transparent to visible light is preferable.

In the present embodiment, the display electrodes 16 and 18 are paired with bus electrodes 16a and 18a disposed at the outer periphery of each of the discharge cells 14R, 14G and 14B in a direction orthogonal to the address electrode 6. ) And protruding electrodes 16b and 18b extending from the bus electrodes 16a and 18a toward the inside of each discharge cell 14R, 14G and 14B so as to face each other.

The protruding electrodes 16b and 18b serve to cause plasma discharge in the discharge cells 14R, 14G, and 14B, and may be made of transparent indium tin oxide (ITO) to secure luminance. The bus electrodes 16a and 18a may have a multilayer structure of silver (Ag) or chromium (Cr) / copper (Cu) / chromium (Cr).

The display electrode of any one of the pair of display electrodes 16 and 18 participates in the discharge of the address section together with the address electrode 6 to select a discharge cell to be turned on, and the pair of display electrodes ( 16 and 18 serve to display the screen by participating in the discharge of the maintenance section.

The above-described structure is provided in the display area of the PDP. Referring to FIG. 2, the front substrate 4 and the back substrate 2 are integrally bonded to each other by a sealing material, and the inside of the display area 24 is described above. One structure is provided to achieve a practical display.

In this case, the PDP of the present embodiment moves the display area 24 to a plurality of areas along the scan progress direction to compensate for the deterioration of the address discharge capability caused by the insufficient effect of the space charge at the end portion of the PDP. A configuration in which the width of the address electrode 6 is changed in each area is provided.

First, as shown in FIG. 2, the display area 24 is divided into three areas, that is, the first area, the second area, and the third area, along the scanning progress direction (the length direction of the address electrode). The division of the three regions is only one example, and the display region 24 may be divided into two regions along the scanning progress direction or divided into three or more regions.

3 is an enlarged cross-sectional view of the back substrate and the structure provided thereon, showing a cross section in the first region, the second region and the third region.

Referring to FIG. 3, the address electrode 6 is formed to have a width of W1 in the first region where scanning is performed first, and the address electrode 6 is smaller than W1 in the second region where scanning is performed after the first region. It is formed with a large W2 width. In the third region where the scan is performed next to the second region, the address electrode 6 is formed to have a width of W3 larger than W2. As described above, the address electrode 6 has a larger width in a region where scanning is performed later.

Therefore, even if the address discharge capability is deteriorated due to the insufficient effect of the space charge in the region where the scan is performed later, the expanded width of the address electrode 6 compensates for the degradation of the address discharge capability, thereby increasing the address discharge capability under the same driving conditions. As a result, the PDP of this embodiment can realize a uniform address discharge capability substantially throughout the display area.

4 is a partially exploded perspective view of a plasma display panel according to a second embodiment of the present invention.

Referring to FIG. 4, in the present embodiment, the display electrodes 16 and 18 are interposed between the pair of display electrodes 16 and 18 on the front substrate 4 based on the configuration of the first embodiment described above. The intermediate electrode 26 which extends along the side by side direction is further formed.

The intermediate electrode 26 serves to select a discharge cell to be turned on by participating in the discharge of the address section together with the address electrode 6, and the pair of display electrodes 16 and 18 participate in the discharge of the sustain period. It serves to display the screen. However, since the electrodes may have different roles depending on the signal voltage applied thereto, the present invention need not be limited to the above.

As shown in FIG. 2, the PDP of the present embodiment having the intermediate electrode 26 is further divided into a first region, a second region, and a third region along the scanning progress direction, as shown in FIG. 5. The width of the intermediate electrode 26 is configured differently for each region.

That is, referring to FIG. 5, the intermediate electrode 26 is formed to have a width of W4 in the first region where the scan is performed first, and the intermediate electrode 26 is W4 in the second region where the scan is performed after the first region. It is formed with a width of greater W5. In the third region where the scan is performed after the second region, the intermediate electrode 26 is formed to have a width of W6 greater than W5. As described above, the intermediate electrode 26 has a larger width in a region where a scan is performed later.

Therefore, even if the address discharge capability is degraded in the region where the scan is performed later, the expanded width of the intermediate electrode 26 compensates for the decrease in the address discharge capability to increase the address discharge capability under the same driving conditions. As a result, the PDP of this embodiment can also realize a uniform address discharge capability in the entire display area.

On the other hand, in the structure having the intermediate electrode 26 as shown in Fig. 4, not only the width of the intermediate electrode 26 changes in each region but also the structure in which the width of the address electrode 6 changes simultaneously.

3 and 5, the address electrode 6 is formed to have a width of W1 and the intermediate electrode 26 is formed to have a width of W4 in the first region where scanning is performed first. In the second region where the scan is performed after the first region, the address electrode 6 is formed to have a width of W2 larger than W1, and the intermediate electrode 26 is formed to have a width of W5 larger than W4. In the third region where scanning is performed last, the address electrode 6 is formed to have a width of W3 larger than W2, and the intermediate electrode 26 is formed to have a width of W6 larger than W5.

As described above, the address electrode 6 and the intermediate electrode 26 have a larger width in the region where the scan is performed later, and increase the address discharge capability in the region where the scan is performed later.

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

As described above, according to the plasma display panel according to the present invention, the address discharge capability caused by the insufficient space charge effect is compensated for in the region where scanning is performed later, thereby substantially securing the address discharge capability uniformly in the entire display region. Can be. Therefore, the plasma display panel according to the present invention has an effect of stabilizing address discharge and sustain discharge, and increasing luminance uniformity of the screen.

Claims (6)

A first substrate and a second substrate on which the display area is set and disposed to face each other; Address electrodes formed on the first substrate in parallel with one direction; A partition wall disposed in a space between the first substrate and the second substrate to partition a plurality of discharge cells; Phosphor layers formed in the discharge cells; And Display electrodes formed on the second substrate in parallel with the address electrode; And Intermediate electrodes positioned between the display electrodes corresponding to the respective discharge cells; The display area is divided into a plurality of areas along a scan progress direction, and the address electrodes are formed to have a larger width as a region where a scan is performed later. delete The method of claim 1, And the intermediate electrodes are formed to have a larger width in a region where scanning is performed later. delete The method according to claim 1 or 3, And the display area is divided into three areas along a length direction of the address electrode. The method according to claim 1 or 3, And a plurality of bus electrodes in which pairs of the display electrodes are disposed to correspond to the outer portions of the discharge cells, and protruding electrodes extending from the bus electrodes toward the inside of each discharge cell.

Images