KR100515840B1 - Plasma Display Panel improving structure of barrier ribs - Google Patents

Abstract

An object of the present invention is to provide a plasma display panel having an improved structure of a partition wall for preventing crosstalk of charged particles during sustain discharge.

In order to achieve this object, the present invention is to face the front substrate, the front electrode layer and the front substrate to be formed parallel to each other on the inner surface of the front substrate to generate a kitchen, embedding the scan and sustain electrode, the front substrate On the inner surface of the rear substrate and the rear substrate to be disposed, an address electrode formed to intersect the scan electrode and the sustain electrode, a rear dielectric layer filling the address electrode, and a rear dielectric layer are formed on the upper surface of the rear substrate, and the upper surface of the rear substrate is formed through a gap with the front dielectric layer. Provided are a plasma display panel including partitions in which a trap part for trapping charged particles that are crosstalk is formed, and a phosphor applied between the partitions.

Description

Plasma display panel improving structure of barrier ribs

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having a partition having an improved structure to prevent crosstalk of charged particles.

Plasma display panels, which are recently attracting attention as replacing conventional cathode ray tube display devices, have a discharge voltage applied after discharge gas is filled between two substrates on which a plurality of electrodes are formed. Therefore, the phosphor formed in a predetermined pattern is excited by ultraviolet rays generated from the discharge gas, thereby obtaining a desired image.

The plasma display panel may be classified into a direct current type and an alternating current type according to a discharge type. In the DC plasma display panel, the electrodes are exposed to the discharge space, so that the movement of charged particles is made directly between the corresponding electrodes. In the AC plasma display panel, at least one electrode is covered with a dielectric layer, and the direct charge of the corresponding electrodes The discharge is performed by the electric field of the wall charge instead of the movement.

As shown in FIG. 1, a typical AC plasma display panel includes a front substrate 10 showing an image to a user and a rear substrate 20 coupled in parallel thereto. Scan electrode 11 and sustain electrode 12 are arranged in pairs on front substrate 10, and rear substrate 20 facing the surface on which scan and sustain electrodes 11 and 12 of front substrate 10 are disposed. ) Is disposed so that the address electrode 21 crosses the electrodes 11 and 12 of the front substrate 10. The scanning and sustaining electrodes 11 and 12 of the front substrate 10 are usually transparent electrodes made of indium tin oxide (ITO), and are commonly called transparent electrodes. The upper surface of these transparent electrodes is made of, for example, a metal material to reduce line resistance. A bus electrode 13 made of a narrow width is disposed. The space formed by the pair of scan and sustain electrodes 11 and 12 and the address electrodes 21 intersecting the same form one discharge space as one cell.

The front dielectric layer 14 and the rear surface of the front substrate 10 provided with the scan and sustain electrodes 11 and 12 and the back substrate 20 provided with the address electrode 21 are embedded in each surface. Dielectric layer 24 is formed. A protective layer, usually made of MgO, is formed on the front dielectric layer 14, and a plurality of barrier ribs 30 are formed on the rear dielectric layer 24 to maintain a discharge distance and prevent electro-optical crosstalk between cells. Phosphors of red, green, and blue are applied to the upper surface of the rear dielectric layer 24 on which both side surfaces and the partition wall 30 are not formed.

The operation of the plasma display panel having such a structure is as follows. When a predetermined voltage is applied to the address electrode 21 and the scan electrode 11, a discharge cell for emitting light is selected, and an address discharge occurs between the two electrodes to charge wall charges on the front dielectric layer 14. When a predetermined voltage is applied between the scan electrode 11 and the sustain electrode 12, the wall charge is moved between the two electrodes 11 and 12, causing the discharge gas to cause the sustain discharge, thereby discharging the discharge gas. Ultraviolet rays are generated, and the generated ultraviolet rays excite the phosphor layer 25 to form an image.

However, in the conventional plasma display panel, as shown in FIG. 2, the partition wall 30 is coupled to the rear dielectric layer 24 and formed on the upper surface thereof, but the upper portion thereof is not coupled to the front dielectric layer 14. It does not have a configuration. Therefore, the charged particles generated during the sustain discharge between the scan electrode 11 and the sustain electrode 12 move to adjacent discharge cells through the gap between the upper surface of the partition 30 and the front dielectric layer 14, thereby causing crosstalk ( As a result of crosstalk, an erroneous discharge occurs and the contrast is reduced. In particular, in the plasma display panel which requires high definition, the spacing between the partition walls becomes narrow, and the charged particles have a high density, so that more crosstalk of the charged particles occurs, resulting in misdischarge and resulting contrast reduction. The problem is even greater.

SUMMARY OF THE INVENTION The present invention has been made to solve various problems including the above problems, and a main object of the present invention is to provide a plasma display panel having a partition having a structure for preventing crosstalk of charged particles during sustain discharge.

In order to achieve the above object, the present invention provides a front substrate, a scan electrode and a sustain electrode which are formed in parallel to the inner surface of the front substrate to generate a sustain discharge, and a front dielectric layer to fill the scan, the sustain electrode And a rear substrate disposed to face the front substrate, an address electrode formed on the inner surface of the rear substrate to intersect the scan electrode and the sustain electrode, a back dielectric layer filling the address electrode, and the back dielectric layer. A plasma display panel having a plasma display panel is provided on the upper surface, and includes partition walls on which a trap part is formed to trap charged particles crosstalk through a gap with the front dielectric layer, and a phosphor applied between the partition walls.

The trap part is preferably formed in a portion corresponding to the sustain discharge region between the sustain electrode and the scan electrode.

In addition, the part in which the trap part is formed in the partition wall is preferably wider than other parts.

Meanwhile, the trap part may be a groove, wherein the cross section of the groove may be elliptical or rectangular.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, the same reference numerals as in FIG. 1 denote the same components having the same functions.

Referring to FIG. 3, a plasma display panel according to an exemplary embodiment of the present invention includes a front substrate 10, a scan electrode 11, a sustain electrode 12, a bus electrode 13, a front dielectric layer 14, and a protective layer. 15, a rear substrate 20, an address electrode 21, a rear dielectric layer 23, phosphors (not shown), and partitions 300 are provided. The plasma display panel of this embodiment includes a bus electrode 13 and a protective layer 15. However, the plasma display panel of the present invention is not necessarily limited thereto, and includes a bus electrode 13 and a protective layer 15. You may not.

Scan electrodes 11 and sustain electrodes 12 are formed on one side of the front substrate 10 in parallel with each other to generate sustain discharges. The scan and sustain electrodes 11 and 12 are formed of the front dielectric layer 13. ) Is being buried.

An address electrode 21 is formed on the inner surface of the rear substrate 20 facing the front substrate so as to intersect the scan and sustain electrodes 11 and 12. This address electrode is embedded by the back dielectric layer 23. The rear dielectric layer is provided with barrier ribs 300 forming a cell boundary and preventing crosstalk of charged particles, and a phosphor layer (not shown) is applied to the side surfaces of the barrier ribs.

Meanwhile, a trap part 302 is formed in the partition wall. In this case, it is preferable that the trap part has a shape of a groove, because the method of forming the groove is simple when the partition wall is formed, and there is an advantage that the charged particles to be crosstalk can be easily trapped in the groove. In this case, the groove may have various shapes according to the shape of the portion where the sustain discharge occurs, and the cross section 302 may have a rectangular shape or an oval shape as shown in FIGS. 4A and 4B. As shown in FIG. 5, the trap part is formed in a portion D corresponding to the sustain discharge region M in which a sustain discharge mainly occurs between the scan electrode 11 and the sustain electrode 12. desirable. In the sustain discharge, voltage is applied to the scan electrode 11 and the sustain electrode 12 alternately, so that charged particles move and discharge between the scan and sustain electrodes, so that crosstalk is most significant in the sustain discharge region M. FIG. Because it happens frequently. However, the present invention is not necessarily limited thereto, and for example, the trap part 302 may be formed in the partition portion that does not correspond to the sustain discharge region M. FIG.

FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 3. Referring to FIG. 6, the operation of the barrier ribs may include charged particles generated due to the application of voltages from the sustain electrode 12 and the scan electrode 11 to upper surfaces of the front dielectric layer 14 and the barrier 300. Crosstalk is made to the adjacent cell through the gap between. At this time, the charged particles to be crosstalk is trapped by the trap 302 formed on the upper surface of the partition 300, thereby preventing the crosstalk of the charged particles.

As shown in FIG. 7 and FIG. 8, the portion of the partition 310 in which the trap part 312 is formed is preferably wider than other portions, and the width of the partition 310 is wider than that of the charged particles. Crosstalk is primarily reduced, and the charged particles crosstalk through the gap between the front dielectric layer 14 and the upper surface of the partition wall 310 are secondarily confined through the trap, thereby preventing crosstalk of the charged particles. This is because misdischarge and contrast improvement become more remarkable.

The present invention having the above configuration can prevent the charged particles formed at the time of sustain discharge to crosstalk to the adjacent discharge cells, and as a result, erroneous discharge can be prevented, and the contrast can be improved.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and any person skilled in the art to which the present invention pertains may have various modifications and equivalent other embodiments. Will understand. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a perspective view schematically showing a conventional plasma display panel according to the related art;

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1,

3 is a perspective view showing a plasma display panel according to a preferred embodiment of the present invention;

4A and 4B are sectional views showing a cross section of a groove formed in a partition wall taken along line IV-IV of FIG. 3,

FIG. 5 is a plan view illustrating the shapes of the partition walls, the scan electrodes, and the sustain electrodes of FIG. 3;

6 is a cross-sectional view taken along line VI-VI of FIG. 3,

7 is a perspective view illustrating a partition wall having another shape of a plasma display panel according to an exemplary embodiment of the present invention.

FIG. 8 is a plan view illustrating the shapes of the partition walls, the scan electrodes, and the sustain electrodes of FIG. 7.

Explanation of symbols on main parts of drawing

10: front substrate 11: scanning electrode

12: sustain electrode 13: bus electrode

14: front dielectric layer 20: back substrate

21: address electrode 24: rear dielectric layer

25: phosphor 300,310: partition wall

302,312: trap part

Claims (6)

Front substrate; Scan electrodes and sustain electrodes disposed in pairs on one side of the front substrate of each unit cell and having sustain discharge regions formed therebetween to generate sustain discharges; A front dielectric layer filling the scan and sustain electrodes; A rear substrate disposed to face the front substrate; An address electrode formed on one side of the rear substrate to cross the scan electrode and the sustain electrode; A back dielectric layer filling the address electrode; Barrier ribs formed on the rear dielectric layer to form a boundary between the adjacent cells; And A phosphor applied between the partition walls; And a groove-shaped trap portion for trapping charged particles that are crosstalk beyond the upper surface of the partition wall formed to be at least parallel to the scan electrode and the sustain electrode. delete The plasma display panel of claim 1, wherein a portion of the barrier rib in which the trap portion is formed is wider than another portion. delete The plasma display panel of claim 1, wherein a cross section of the groove is elliptical. The plasma display panel of claim 1, wherein a cross section of the groove is a quadrangle.