KR100612380B1 - Plasma display panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel capable of maintaining a good discharge characteristic by causing an address discharge to occur accurately in discharge cells even when the alignment between the first substrate and the second substrate is slightly misaligned.

First and second substrates disposed to face each other at arbitrary intervals; Address electrodes positioned on opposite surfaces of the first substrate, the first and second address electrode groups respectively disposed on upper and lower regions of the first substrate; A sustain electrode formed along a direction crossing the address electrodes on the opposite surface of the second substrate, the at least one address electrode group having an extension at an end facing the other address electrode group; Provided is a plasma display panel.

Plasma, display, substrate, address electrode, sustain electrode, scan electrode, common electrode, dual scan, extension

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

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

FIG. 2 is a partial plan view illustrating the assembled state of FIG. 1. FIG.

3 is a partial plan view of a plasma display panel for explaining a modification of FIG. 2.

4 is a partial plan view of a plasma display panel according to the prior art.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel. More particularly, the present invention relates to an AC plasma display panel in which an address electrode is divided into two regions and driven in a dual scan method.

In general, a plasma display panel (PDP) is referred to as 'PDP' to excite phosphors by vacuum ultraviolet rays caused by gas discharge occurring in a discharge cell, and an image is generated. Grating or other shape) and is partitioned by partition walls located on the back substrate.

In the AC type PDP having a three-electrode surface discharge structure, which is commonly used in recent years, an address electrode is formed on a rear substrate corresponding to each discharge cell, and a sustain electrode composed of a scan electrode and a common electrode is orthogonal to the address electrode. Furnace is provided on the front substrate. At this time, the address electrode and the sustain electrode are covered with respective dielectric layers.

The PDP described above is, as is well known, an initialization section for preparing new information to be stored in the discharge cell, an address section for selecting the discharge cell through discharge between the address electrode and the scan electrode, and between the scan electrode and the common electrode. The drive is divided into sustain periods in which actual light is emitted through discharge, and one display is formed through these three periods.

On the other hand, in a high-definition (HD) PDP having a vertical resolution of 768 or more, the address electrodes are generally divided into two upper and lower regions and driven in a dual scan method. In this case, at the center of the PDP, the address electrodes are positioned apart from each other at a process-implementable distance without causing mutual interference.

4 is a schematic diagram showing an address electrode and a sustain electrode in a PDP driven by a dual scan method. Referring to the drawing, the address electrode 40 is divided into upper and lower regions A and B of the PDP, and the scan electrode 41Y and the common electrode 41X are disposed along the address electrode direction (Y direction in the drawing). They are arranged alternately. In the drawing, as an example, the scan electrode 41Y is disposed on the common electrode 41X for each discharge cell 42.

However, in the dual scan PDP, when one substrate is slightly shifted or misaligned with respect to the other substrate when the front and rear substrates are assembled, the address electrodes 40 are slightly misaligned. In the center of the separated screen, the discharge characteristics may change significantly.

That is, assuming that the front substrate is moved upward in the drawing with respect to the rear substrate, an intersection region of the address electrode 40 and the scan electrode 41Y is set as designed on the upper portion of the lower region B of the PDP. Therefore, the address discharge does not occur smoothly in the discharge cells positioned on the upper portion of the lower region B.

In addition, assuming that the front substrate is distorted at an angle with respect to the rear substrate, in this case, the scan electrode 41Y and the address electrode 40 do not intersect properly in the upper portion of the lower region B of the PDP. The address discharge does not occur smoothly in the discharge cells in which the scan electrode 41Y and the address electrode 40 are shifted.

When the address discharge does not occur smoothly in this manner, wall charges, which are the result of the address discharge, are not sufficiently generated in the discharge cells. As a result, even when a sustain voltage is applied between the scan electrode and the common electrode during sustain discharge, the plasma is discharged. The discharge is weak and may lead to a problem in which the actual display does not occur.

Accordingly, an object of the present invention is to solve the above problems, and an object of the present invention is to accurately maintain discharge characteristics by causing address discharge to occur accurately in discharge cells even when the alignment between the front substrate and the rear substrate is slightly misaligned. It is to provide a plasma display panel.

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

Address electrodes including first and second substrates, and first and second address electrode groups respectively disposed on upper and lower regions of the first substrate while being disposed on opposite surfaces of the first substrate; A sustain electrode formed along a direction crossing the address electrodes on the opposite surface of the second substrate, the at least one address electrode group having an extension at an end facing the other address electrode group; Provided is a plasma display panel.

The sustain electrodes include a scan electrode and a common electrode that are alternately arranged along the direction of the address electrode, and when the scan electrode is located at the boundary between the upper and lower regions corresponding to any one of the address electrode groups, the address electrode Extensions may be provided only at the ends of the group. The extension is made of any shape of polygon, circle and oval.

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 an exemplary embodiment of the present invention, and FIG. 2 is a partial plan view illustrating an assembled state of FIG. 1.

Referring to the drawings, the plasma display panel (hereinafter referred to as 'PDP') according to the present exemplary embodiment is disposed with the first substrate 10 and the second substrate 20 facing each other at random intervals, and between the substrates. Discharge cells 30R, 30G, and 30B are provided in a space to implement an arbitrary color image by visible light emission by an independent discharge mechanism of each discharge cell 30R, 30G, or 30B.

Looking at the configuration in detail, first, the address electrodes 11 are formed in one direction (Y direction of the drawing) on the inner surface of the first substrate 10, covering the address electrodes 11 of the first substrate 10 The first dielectric layer 12 is formed over the entire inner surface. The address electrodes 11 are formed in a stripe pattern, for example, and are positioned side by side with a neighboring address electrode 11 at a predetermined interval.

In the present exemplary embodiment, the address electrode 11 is positioned in the first address electrode group 11A positioned in the upper region A of the first substrate 10 and in the lower region B of the first substrate 10. It is separated into the second address electrode group 11B and is driven in a known dual scan method.

On the first dielectric layer 12, a partition 13, for example, a stripe pattern 13 parallel to the address electrode 11 is formed, and is disposed on the side surface of the partition 13 and the upper surface of the first dielectric layer 12. The red, green, and blue fluorescent layers 14R, 14G, 14B are located in order. The shape of the partition wall 13 is not limited to the stripe pattern, but may be formed of a closed structure such as a lattice shape or a pattern other than that.

In addition, the inner surface of the second substrate 20 facing the first substrate 10 is formed of the scan electrode 21Y and the common electrode 21X along the direction orthogonal to the address electrode 11 (the X direction in the drawing). The electrode 21 is formed, and the transparent second dielectric layer 22 and the MgO passivation layer 23 are positioned on the entire inner surface of the second substrate 20 while covering the sustain electrodes 21.

The scan electrode 21Y and the common electrode 21X are alternately arranged along the address electrode direction (Y direction in the drawing). In the drawing, for example, the common electrode 21X is disposed after the scan electrode 21Y. The configuration is shown.

In the present embodiment, the scan electrode 21Y and the common electrode 21X are each formed of the stripe-shaped transparent electrodes 24a and 25a and the low-resistance bus electrodes 24b positioned at one edges of the transparent electrodes 24a and 25a, respectively. 25b). Indium tin oxide (ITO) is preferable as the transparent electrodes 24a and 25a, and metal electrodes containing silver, aluminum or copper are preferable as the bus electrodes 24b and 25b.

The discharge space where the address electrode 11 and the sustain electrode 21 intersect by the combination of the first substrate 10 and the second substrate 20 constitutes one discharge cell 30R, 30G, 30B. The discharge cells 30R, 30G, and 30B are filled with discharge gas (mainly Ne-Xe mixed gas).

By the above-described configuration, for example, the address voltage Va is applied between the address electrode 11 and the scan electrode 21Y of the red discharge cell 30R to select the discharge cell 30R through the address discharge, and the selected When the sustain voltage Vs is applied between the scan electrode 21Y and the common electrode 21X of the discharge cell 30R, plasma discharge occurs in the discharge cell 30R. Then, vacuum ultraviolet rays are emitted from the excitation atoms of Xe produced during plasma discharge, and the vacuum ultraviolet rays excite the fluorescent layer 14R of the corresponding discharge cell 30R to emit visible light.

Here, the PDP according to the present embodiment is a dual scan method in which the address electrodes 11 are separated into the first and second address electrode groups 11A and 11B, and between the first and second substrates 10 and 20 when the PDP is manufactured. Even in the case where the misalignment of the parts is slightly misaligned, a configuration is provided so that address discharge occurs smoothly in the discharge cells located at the boundary points of the first and second address electrode groups 11A and 11B.

In the present embodiment, the above-described configuration includes the extension part 15 having a width larger than that of the address electrode 11 at the end portions at which the first and second address electrode groups 11A and 11B face the other address electrode groups.

As shown in FIG. 2, the extension part 15 has a lower end of the upper region A in which the first address electrode group 11A is located, and a lower region in which the second address electrode group 11B is located. Located at the upper end of B), a pair of expansion portions 15 located on the same vertical line are disposed facing each other with a gap (D) so as not to short each other.

As the expansion portion 15 is positioned at the ends of the first and second address electrode groups 11A and 11B in this manner, when assembling the first substrate 10 and the second substrate 20, the scan electrodes 21Y Even if the scan electrode 21Y is moved away from the address electrode 11 or the scan electrode 21Y is turned at a predetermined angle with respect to the address electrode 11, the scan electrode 21Y does not intersect the address electrode 11 properly in certain discharge cells. 21Y is opposed to the extension 15 to minimize the adverse effect on the address discharge.

That is, for example, the position movement of the second substrate 20 in the upward direction with respect to the first substrate 10 occurs, so that the scan electrode 21Y positioned on the upper portion of the lower region B is the second address electrode group ( Even if it is far from 11B, the scan electrode 21Y faces the expansion part 15 located at the upper end of the second address electrode group 11B, so that the address of the discharge cells located at the upper end of the lower area B is not met. The discharge can be made smoothly.

In addition, even when the second substrate 20 is twisted at a predetermined angle with respect to the first substrate 10, discharge cells in which the scan electrode 21Y does not intersect the second address electrode group 11B are generated. As the scan electrode 21Y faces the extension part 15 in the discharge cells, address discharge can occur smoothly.

Thus, the extension part 15 which prevents an address discharge failure in a dual scan PDP may have any shape as long as it has a width larger than the address electrode 11, such as a circle, an ellipse, and a triangle, in addition to the rectangle shown in FIG.

On the other hand, the above-described extension part 15 results in crossing the scan electrode 21Y with the address electrode 11 even when the alignment between the first and second substrates 10, 20 is slightly misaligned, thereby smoothing the address discharge. As shown in Fig. 3, in one address electrode group in which the scan electrodes 21Y are located at the boundary portions of the upper and lower regions A and B, an extension portion is provided only at the end of the address electrode group. It may be located.

In other words, the drawing shows a configuration in which the common electrode 21X is positioned after the scan electrode 21Y along the address electrode direction (Y direction in the drawing), so that the upper region (where the first address electrode group 11A is located) In A), the common electrode 21X is positioned at the lower end of the upper region A, but in the lower region B in which the second address electrode group 11B is located, the scan electrode (at the upper end of the lower region B) 21Y) is located. Accordingly, the extension 16 is provided only at the end of the second address electrode group 11B with respect to the second address electrode group 11B in which the scan electrode 21Y is located at the boundary between the upper and lower regions A and B. The configuration is also possible.

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, in the exemplary embodiment of the present invention, as the extension part is positioned at the ends of the first and second address electrode groups, the scan electrode faces the extension part even when a slight alignment error occurs when assembling the first substrate and the second substrate. By doing so, address discharge can be caused smoothly. As a result, the PDP according to the present embodiment has the effect of minimizing defective panels and accurately causing address discharge and sustain discharge to increase display quality.

Claims (5)

First and second substrates disposed to face each other at arbitrary intervals; Address electrodes including a first address electrode group disposed above the first substrate and a second address electrode group disposed below the first substrate; And Sustain electrodes formed on a surface opposite to the first substrate of the second substrate along a direction crossing the address electrodes; And an extension part at an end portion where the first address electrode group and the second address electrode group face each other. The method of claim 1, And a scan electrode and a common electrode, wherein the sustain electrodes are alternately arranged along the address electrode direction. The method of claim 2, And the expansion portion is provided at an end portion of the address electrode group when the scan electrode is located at a boundary between the upper and lower regions corresponding to any one of the address electrode groups. The method of claim 1, And the expansion portion is formed in any one of a polygon, a circle, and an oval. The method of claim 2, And the scan electrode and the common electrode each include a transparent electrode having a stripe pattern, and a low resistance bus electrode disposed on the transparent electrode.

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