KR20040082520A - Plasma display panel having bus electrode structure for checking open fail - Google Patents

Abstract

PURPOSE: A plasma display panel is provided to allow for ease of checking of open failure and achieve improved luminance by enhancing the structure of a trapezoidal electrode. CONSTITUTION: A plasma display panel comprises a front electrode constituted by an X-electrode(420) and a Y-electrode(440) in a unit discharge cell region(400). The X-electrode includes a first member(422X) formed in the direction vertical to the direction of extension of first and second barrier ribs(407a,407b), wherein the first member has an end extended over a second discharge cell region and the other end formed at a point in a first discharge cell region spaced apart from a third barrier rib(407c); a second member(424X) formed in the direction parallel to the first member, wherein the second member has an end extended over a third discharge cell region and the other end formed at a point in the first discharge cell region spaced apart from the first barrier rib; and a third member formed in the direction parallel to the direction of extension of first and second barrier ribs in the first discharge cell region, wherein the third member interconnects the first and second members.

Description

Plasma display panel with bus electrode structure for easy open defect check {PLASMA DISPLAY PANEL HAVING BUS ELECTRODE STRUCTURE FOR CHECKING OPEN FAIL}

The present invention relates to a plasma display panel (PDP), and more particularly, to improve the structure of a ladder-type front electrode without a transparent electrode to facilitate open defect check without deterioration in discharge efficiency and at the same time increase the luminance of light emission. The front electrode structure of the plasma display panel that can be made.

The plasma display panel is composed of two panels formed to face each other, and is filled with discharge gases such as Ne and Xe, and the vacuum ultraviolet rays generated through the gas discharge are red (R), green (G), and blue ( B) A display element which displays an image by exciting fluorescent substance and generating visible light.

Among various flat panel displays, plasma display panels are easy to implement thin and large screens, and thus the use of plasma display panels is increasing to the current market bulletin boards of stock exchanges, video conference displays, and large screen wall-mounted TVs.

1 is an exploded perspective view showing a conventional AC plasma display panel.

Referring to FIG. 1, in the plasma display panel, two glass substrates 1 and 2 are disposed to face each other, and one side of the front glass substrate 1 facing the rear glass substrate 2 is striped. A plurality of transparent electrodes 3 are formed in parallel with each other, and each of the transparent electrodes 3 is formed with a bus electrode 4 narrower than the transparent electrode 3 in the longitudinal direction thereof. The bus electrode 4 is covered with a transparent dielectric layer 5, and a transparent protective film 6 made of magnesium oxide (MgO) or the like is formed on the dielectric layer 5.

On the other hand, a plurality of stripe-shaped address electrodes 7 are formed on one side of the rear glass substrate 2 so as to be orthogonal to the transparent electrodes 3, and these address electrodes 7 are formed of a dielectric layer 8 having high reflectance. ), A plurality of partitions 9 are formed on the dielectric layer 8 in parallel with the address electrodes 7 and positioned between the address electrodes 7, and the gas discharge spaces are formed by the partitions 9. An in-groove discharge cell 10 is formed, and phosphors 11 corresponding to three primary colors R, G, and B (red, green, and blue) are formed inside these discharge cells 10.

Then, the two glass substrates 1 and 2 are opposed to each other, and the surroundings are enclosed in a state in which a mixed gas such as Ne-Xe, He-Xe or the like using 147 nm Xe resonance emission light is enclosed inside each discharge cell 10. It is the structure sealed with seal glass etc.

The transparent electrode 3 is made of a transparent conductive material such as indium tin oxide (ITO), SnO _2, or the like.

The bus electrode 4 is provided to lower the resistance of the transparent electrode 3 having a high sheet resistance, and has a lower sheet resistance than the transparent electrode 3, for example, Ag or Cr-Cu-. A laminate of Cr or the like is used.

In the plasma display panel, the transparent electrode 3, the bus electrode 4, and the address electrode 7 are drawn out to the outside, respectively, and selectively apply voltages to the terminals connected thereto, thereby selectively selecting each of the discharge cells 10 in the discharge cell 10. FIG. A discharge is generated between the electrodes 3 and 4 and the electrode 7, and the excitation light is displayed from the phosphor 11 in the discharge cell 10 to the outside by this discharge. The light emitting surface at this time becomes a surface portion of the phosphor 11 coated in the discharge cell 10.

2 is a plan view showing the electrodes of the front panel together with the partition walls of the back panel.

As shown in FIG. 2, the plurality of partitions 9 have a stripe shape formed parallel to each other in one direction, and the plurality of transparent electrodes 3 and the plurality of bus electrodes 4 vertically intersect the partition 9. It is arranged in parallel with each other in the direction to. The electrodes (front electrodes) of the front panel composed of the transparent electrodes 3 and the bus electrodes 4 are formed in pairs as the X electrodes 50 and the Y electrodes 60 in the unit discharge cell region. .

3 is a cross-sectional view showing an electrode structure of a plasma display panel according to another prior art, which is a technique disclosed in Korean Patent Laid-Open No. 2001-0018861.

Referring to FIG. 3, the front electrode is formed of only a ladder-shaped non-transparent bus electrode without a transparent electrode. That is, the X-electrode 70 and the Y-electrode 80 are each composed of members 4a, 4b and 4c of highly conductive metal having a trapezoidal shape without an ITO transparent electrode.

Specifically, the X-electrode 70 and the Y-electrode 80 respectively extend substantially perpendicular to the partition wall 7 and are connected to the input terminal portion of the driving waveform, and the first member. And a second member 4b extending in parallel to form a discharge gap between the X-electrode 70 and the Y-electrode 80, and extending in parallel to the partition 7 at the center of the adjacent partitions 7. It is formed of a third member (4c) for interconnecting the first member (4a) and the second member (4b).

The prior art shown in FIG. 3 does not require a conductive layer of a material that transmits light, such as an ITO transparent electrode, thereby greatly reducing the manufacturing process and cost of the panel, but when an open defect occurs in the manufacturing process. There is a problem that can not be checked.

That is, since the first member 4a, the second member 4c, and the third member 4c are connected in parallel, the first member, the second member, and the third member in any of the radiation cell regions. If any one of the members is open, there is a problem that can not be checked.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display panel which can improve the structure of a ladder-type electrode without a transparent electrode to facilitate open defect check without deterioration of discharge efficiency and at the same time increase light emission luminance.

1 is a perspective view showing the structure of a conventional AC PDP,

2 is a plan view illustrating the front electrode structure of FIG. 1;

3 is a plan view showing a ladder-type bus electrode structure according to the prior art,

4 is a plan view showing a front electrode structure according to the present invention;

5 is a voltage waveform diagram applied to each electrode to drive the panel under the front electrode of FIG. 4 according to the present invention.

*** Explanation of symbols for main parts of drawing ***

400: unit discharge cell area

407a, 407b: bulkhead

420, 422_X, 424_X, 426_X: X-electrode

440, 422_Y, 424_Y, 426_Y: Y-electrode

The plasma display panel of the present invention for achieving the above object is a front electrode configured as an X-electrode and a Y-electrode pair in the first discharge cell region defined by the first and second barrier ribs adjacent to each other in parallel. In the plasma display panel provided, the X-electrode is formed to extend in a direction perpendicular to the direction in which the first and second partitions are extended, wherein one end of the second discharge neighbors past the first partition. A first member extending to a cell region and formed at a point in the first discharge cell region where the other end is spaced apart from the third partition by a predetermined distance; The first discharge cell region is formed to extend in parallel with the first member, one end portion is extended to the neighboring third discharge cell region passing through the second partition wall, and the other end is spaced apart from the first partition wall by a predetermined distance. A second member formed at a point in the body; And a third member in the first discharge cell region extending in parallel with the extending direction of the first and second partition walls and interconnecting the first member and the second member. .

Preferably, in the present invention, the Y-electrode is formed to extend in a direction perpendicular to the direction in which the partitions are extended, and one end is formed to extend to the third discharge cell region beyond the second partition. A fourth member having an end portion formed at a point in the first discharge cell region spaced apart from the first partition wall by a predetermined distance; The first discharge cell region formed to extend in parallel with the fourth member, one end of which extends through the first partition wall to the second discharge cell region, and the other end of which is spaced a predetermined distance from the second partition wall A fifth member formed at a point in the body; And a sixth member extending in parallel with the extended direction of the first and second partition walls in the first discharge cell region and interconnecting the fourth member and the fifth member to each other. .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may more easily practice the present invention.

4 is a plan view showing the structure of the front electrode of the plasma display panel according to the present invention. The partition wall of the rear panel and the front electrode (X-electrode, Y-electrode) of the front panel are shown together and adjacent to each other in parallel. The electrode structure in three R, G, B discharge cell regions 400 defined by four partitions 407a, 407b, 407c, 407d is shown.

Referring to FIG. 4, the front electrode is provided as a pair of the X-electrode 420 and the Y-electrode 440 in the unit discharge cell region 400, and the gap between the X-electrode and the Y-electrode is a discharge gap ( Gap).

The X-electrode and the Y-electrode are each composed of only a non-transparent conductive material without a transparent electrode. That is, it consists of highly conductive non-transparent members 422, 424, 426 without an ITO transparent electrode, for example, a laminated body of Ag or Cr-Cu-Cr.

The electrode structure in any of the discharge cell regions is discussed. The G cell region 400 defined by the neighboring second and third partition walls 407b and 407c is described.

Planarly, the X-electrode 420 extends in a direction perpendicular to the direction in which the partitions are extended, one end of which extends through the second partition 407b to the neighboring R cell region and the other end of the X-electrode 420 and the third partition 407c. The first member 422_X extends only to a point spaced apart from the third partition 407c by a predetermined distance without overlapping. It extends in parallel with the first member 422_X, one end extends through the third partition 407c to the neighboring B cell region, and the other end does not overlap with the second partition 407b and the second partition 40b. The second member 424_X and the second member 424_X, which extend only to a predetermined distance, extend parallel to the direction in which the partitions extend in the G-cell region, and interconnect the first and second members 422_X and 424_X. It consists of the 3rd member 426_X.

In a planar manner, the Y-electrode 440 extends in a direction perpendicular to the direction in which the partitions extend, with one end extending through the third partition 407c to the neighboring B cell region, and the other end extending from the second partition 407b. The first member 422_Y extended only to a point spaced apart from the second partition wall 40b by a predetermined distance without overlapping. A third partition that extends in parallel with the first member 422_Y, one end of which extends beyond the second partition 407b to a neighboring R cell region, and the other end of which is not overlapped with the third partition 407c; The second member 424_Y extends only to a point spaced apart from the predetermined distance 407c, and the first member 422_Y and the second member 424_Y extend in parallel with the direction in which the partition walls extend in the G cell region. The third member 426_Y is connected to each other.

The gap between the second member 424_X of the X-electrode 420 and the second member 424_Y of the Y-electrode 440 becomes a discharge gap.

The X-electrode and Y-electrode structures of the present invention each have a configuration that extends to a single line as compared with the prior art. Therefore, even if any member of each electrode is partially opened, a defect can be checked immediately.

And, in terms of discharge efficiency, the electrode portions (electrodes in portions adjacent to the partition walls) removed in comparison with the conventional ladder structures are regions that are substantially ineffective for discharge. Thus, the present invention does not substantially contribute to discharge. Since a part of the electrode is removed, open defects of the electrode can be checked without lowering the discharge efficiency.

In addition, since the total area of the electrode occupying in the discharge cell is reduced in comparison with the conventional ladder electrode structure, the light emission luminance can be increased by increasing the aperture ratio.

In the exemplary embodiment of the present invention, the partition wall has been described as an example of a stripe shape, but the partition wall may have another shape such as a lattice shape, and the electrode width of each member may be the same or different.

In addition, the embodiment of the present invention has described the case where the first, second and third members are all non-transparent high conductivity materials. However, in the present invention, only the first member may be used as the non-transparent high conductivity material, and the second and third members may use a transparent conductive material such as, for example, indium tin oxide (ITO) or SnO ₂ even if the conductivity is poor. .

In addition, the technical idea of the present invention may be applied to only one of the X-electrode and the Y-electrode.

Hereinafter, an example of a method for driving each electrode of the above embodiments will be described.

5 is a voltage waveform diagram applied to each electrode in one subfield. Referring to FIG. 7, one subfield may be divided into an erase period T1, a write period T2, and a sustain period T3 in time.

The erase section T1 is a section initialized by applying pulses to the X-electrode line X and the Y-electrode line Y by erasing charges generated while the plasma display panel displays previous information.

In the writing section T2, a predetermined voltage is applied between the X-electrode line X and the address electrode line Z with respect to the discharge cell to be turned on to cause discharge between the two electrodes. This is called a write discharge and cations and electrons which are ionized by the write discharge accumulate on the dielectric surface of the front panel as wall charges.

The sustain section T3 is discharged repeatedly by applying an alternating electric field to the X-electrode line X and the Y-electrode line Y. The discharge repeatedly performed between the X-electrode line X and the Y-electrode line Y by the application of an alternating electric field is called sustain discharge, and the ultraviolet rays generated by the sustain discharge excite the phosphor to become visible light. It penetrates the front plate and radiates to the outside.

Although the technical idea of the present invention has been described in detail according to the above preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

The front electrode structure of the plasma display panel according to the present invention can be easily checked when an open defect of an electrode occurs in the manufacturing process, and can also check the open defect while suppressing a decrease in discharge efficiency.

Furthermore, since the opening ratio of the discharge cells is increased as compared with the conventional ladder electrode structure, there is an effect of improving the luminescence brightness.

Claims (7)

A plasma display panel having a front electrode configured as an X-electrode and a Y-electrode pair in a first discharge cell region defined by a first barrier rib and a second barrier rib that are adjacent to each other in parallel. Planarly the X-electrode, The first and second partitions are formed to extend in a direction perpendicular to the extending direction, one end of which extends to the neighboring second discharge cell region through the first partition and the other end is a predetermined distance from the third partition. A first member formed at a point in the spaced apart first discharge cell region; The first discharge cell region is formed to extend in parallel with the first member, one end portion is extended to the neighboring third discharge cell region passing through the second partition wall, and the other end is spaced apart from the first partition wall by a predetermined distance. A second member formed at a point in the body; And And a third member in the first discharge cell region extending in parallel with the extending direction of the first and second partition walls and interconnecting the first member and the second member. Plasma display panel. The method of claim 1, Planarly the Y-electrode, The barrier ribs are formed to extend in a direction perpendicular to the extending direction, one end of which extends through the second barrier to the third discharge cell region, the other end of which is spaced apart from the first barrier by a predetermined distance. A fourth member formed at a point in the discharge cell region; The first discharge cell region formed to extend in parallel with the fourth member, one end of which extends through the first partition wall to the second discharge cell region, and the other end of which is spaced a predetermined distance from the second partition wall A fifth member formed at a point in the body; And And a sixth member formed in the first discharge cell region to extend in parallel with the direction in which the first and second barrier ribs extend, and interconnecting the fourth member and the fifth member. Display panel. The method according to claim 1 or 2, And the first and second barrier walls have a stripe shape. The method of claim 1, And the first, second and third members are Ag or Cr-Cu-Cr. The method of claim 2, And the fourth, fifth and sixth members are Ag or Cr-Cu-Cr. The method of claim 1, The second and third members are ITO (Indium Tin 0xide) or SnO ₂ characterized in that the plasma display panel. The method of claim 2, And the fifth and sixth members are ITO (Indium Tin 0xide) or SnO ₂ .