KR100303839B1 - Plasma display panel - Google Patents

Abstract

The present invention is a front substrate; A plurality of common electrodes and scan electrodes alternately formed on the lower surface of the front substrate; A dielectric layer coated on a lower surface of the front substrate to fill the common electrode and the scan electrode; A rear substrate installed to face the front substrate; A strip-shaped address electrode disposed on the rear substrate to intersect the common and scan electrodes; A phosphor layer formed on the address electrode along the address electrode; A strip-shaped barrier rib dielectric layer formed of a dielectric material so as to protrude from a lower surface of the dielectric layer to a non-discharge region between the phosphor layers; And a plurality of spacers interposed between the barrier dielectric layer and the rear substrate.

Description

Plasma display panel {Plasma display panel}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, and more particularly, to a plasma display device provided with partition means for removing and replacing partition walls formed on a rear substrate.

In general, a plasma display panel injects and seals gas on two substrates coated with a plurality of electrodes, and then applies a discharge voltage, and a phosphor formed in a predetermined pattern by ultraviolet rays generated by the discharge voltage. Refers to a device that implements the desired number, letter or graphic.

Such a plasma display device may be classified into a direct current type and an alternating current type according to a type of driving voltage applied to a discharge cell, for example, a discharge type, and may be classified into a counter discharge type and a surface discharge type according to a configuration of electrodes.

The direct current plasma display device is a structure in which all electrodes are exposed to a discharge space, and charge is directly transferred between corresponding electrodes. In an AC plasma display device, at least one electrode is embedded in a dielectric layer, and discharge is performed by an electric field of wall charge instead of direct charge transfer between corresponding electrodes.

In the opposite discharge type plasma display, an address electrode and a scan electrode are provided to face each pixel, and an addressing discharge and a sustaining discharge are generated between the two electrodes. Meanwhile, in the surface discharge plasma display device, an address electrode, a common electrode, and a scan electrode corresponding to each unit pixel are provided to generate addressing discharge and sustain discharge.

As illustrated in FIG. 1, a conventional plasma display device 10 includes a front substrate 11 and a rear substrate 12. The lower surface of the front substrate 11 is formed in a strip shape so that the common electrode 13 and the scanning electrode 14 cross each other. Bus electrodes 15 are formed on the lower surfaces of the common and scan electrodes 13 and 14 to reduce line resistance. A dielectric layer 16 is formed on the bottom surface of the front substrate 11 to fill the electrodes 13 and 14. A protective film 17, such as a magnesium oxide (MgO) film, is formed on the bottom surface of the dielectric layer 16.

Meanwhile, an address electorde 18 having a strip shape is formed on the rear substrate 12 opposite to the front substrate 11 so as to intersect the electrodes 13 and 14. The address electrode 18 is embedded by the dielectric layer 19. A partition wall 100 defining a discharge space is formed on the dielectric layer 19, and red, green, and blue phosphor layers 110 are coated between the partition walls 100.

In the conventional plasma display device 10 having the above structure, a voltage is applied between the scan electrode 14 and the address electrode 18 so that preliminary discharge occurs, thereby charging wall charge. In the discharge space filled with the wall charges, a voltage is applied between the common electrode 13 and the scan electrode 14 to form a main discharge, thereby forming plasma. Ultraviolet rays are emitted therefrom to excite the phosphor layer 110 to implement an image.

Here, the partition wall 100 is necessary to limit the discharge space between the front and rear substrates (11, 12), and to prevent cross-talk between the electrode cells when the discharge occurs. In order to form the partition wall 100 that performs this role, the screen having the same pattern as the partition wall 100 may be brought into close contact with the rear substrate 12, and the barrier 100 raw material may be printed and dried and fired.

By the way, when printing the partition material 100, the partition 100 is not aligned properly in the process of laminating repeatedly may cause a position error. This positional error causes a failure of the partition 100 pattern, and thus, the working process is quite difficult. In addition, the phosphor layer 110 applied between the barrier ribs 100 may not be easily formed due to the presence of the barrier ribs 100.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a plasma display device having an improved structure such that a partition wall formed on a rear substrate is removed, and a partition wall means for performing a corresponding role is formed on the front substrate. The purpose is to provide.

1 is a partial ablation perspective view illustrating a conventional plasma display device;

2 is a partial ablation perspective view illustrating a plasma display device according to the present invention;

3 is a cross-sectional view of FIG.

<Brief description of symbols for the main parts of the drawings>

10,20. Plasma Display 11,21. Front board

12,22. Back substrate 13,23. Common electrode

14,24. Scanning electrode 15,25. Bus electrode

16,26. Dielectric Layer 17,27. Shield

18,28. Address electrodes 110,220. Phosphor layer

200. Dielectric layer for partition 210. Spacer

230a. Lumbar 230b. Iron

In order to achieve the above object, a plasma display device according to an aspect of the present invention, a front substrate; A plurality of common electrodes and scan electrodes alternately formed on the lower surface of the front substrate; A dielectric layer coated on a lower surface of the front substrate to fill the common electrode and the scan electrode; A rear substrate installed to face the front substrate; A strip-shaped address electrode disposed on the rear substrate to intersect the common and scan electrodes;

A phosphor layer formed on the address electrode along the address electrode; A strip-shaped barrier rib dielectric layer formed of a dielectric material so as to protrude from a lower surface of the dielectric layer to a non-discharge region between the phosphor layers; And a plurality of spacers interposed between the barrier dielectric layer and the rear substrate.

Here, the spacer is characterized in that the sphere.

Further, the common electrode and the scan electrode is characterized in that the uneven portion having a recessed portion and the convex portion in the longitudinal direction.

Hereinafter, an example of the plasma display device of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a partially cutaway perspective view of the plasma display device 20 according to the present invention, and FIG. 3 is a cross-sectional view of FIG.

2 and 3, the plasma display device 20 is provided with a front substrate 21 and a rear substrate 22. On the front substrate 21, the common electrode 23 and the scan electrode 24 are formed in an intersection strip type on the lower surface thereof. A bus electrode 25 is formed on the lower surface of the electrodes 23 and 24 to serve as an auxiliary electrode which reduces the line resistance of the electrodes 23 and 24 to prevent a voltage drop. The common electrode 23, the scan electrode 24, and the bus electrode 25 are embedded by a dielectric layer 26 formed on the lower surface of the front substrate 21.

At this time, the common electrode 23 and the scan electrode 24 is preferably formed with a predetermined width of the concave-convex portion 230a and the concave portion 230b along the longitudinal direction in order to improve the opening ratio. Do.

In addition, a plurality of barrier rib dielectric layers 200 according to a feature of the present invention are formed in a stripe type on the bottom surface of the dielectric layer 26 so as to be spaced apart by a predetermined interval. A protective film 27 made of a magnesium oxide film may be applied to an outer surface of the barrier dielectric layer 200.

In addition, in order to secure a discharge space of the display device 20, a plurality of spacers 210 having a bead shape are provided on the passivation layer 27. The spacer 210 is arranged to be located in a non-discharge region to be described later.

On the other hand, the address electrode 28 is formed in a strip type on the back substrate 22 which is installed to face the front substrate 21 so as to intersect the common electrode 23 and the scan electrode 24. The address electrode 28 is not shown in the figure, but may be buried by a dielectric layer. In addition, red, green, and blue phosphor layers 220 are formed on an outer surface of the address electrode 28.

As described above, in order to form the partition dielectric layer 200, the screen having the same pattern as the dielectric layer 200 is brought into close contact with the front substrate 21, and then the raw material of the partition dielectric layer 200 is repeatedly printed. It can be formed by drying and firing. At this time, the height is approximately 40 micrometers or less.

In addition, the barrier dielectric layer 200 is formed in a direction parallel to the address electrode 28 so as to be positioned in a non-discharge region formed between the phosphor layers 220 on the rear substrate 22. In this case, the dielectric layer 200 is formed by repeatedly printing a stripe type about 1 to 2 times unlike the conventional barrier ribs (FIG. 1, 100), and thus has an advantage in that there is almost no position error.

In addition, as described above, the spacer 210 formed on the dielectric layer 200 is aligned between the phosphor layers 220, so that there is no influence of luminance loss or the like.

In the plasma display device 20 according to the present invention manufactured as described above, when a voltage is applied between the scan electrode 24 and the address electrode 28, a preliminary discharge occurs between the two electrodes 24 and 28. The charge is charged. Subsequently, a voltage is applied to the common electrode 23 and the scan electrode 24 in a discharge space filled with wall charges, whereby main discharge occurs to form a plasma. As a result, the emitted ultraviolet rays excite the phosphor layer 220 to implement an image.

As described above, the plasma display device of the present invention removes the partition wall formed on the rear substrate and replaces the partition wall on the front substrate, and forms a plurality of spacers on the bottom surface of the partition dielectric layer and the bottom dielectric layer. The following effects can be obtained.

First, a defect in a pattern due to a positional error that may occur in a repeated lamination process when forming a partition wall on a rear substrate may be blocked at source.

Second, by removing the partition on the back substrate, the process of forming a red, green, blue phosphor can be made very easy.

Third, the loss of spacer charges and the like generated during discharging by the partition wall can be reduced, and the electrode of the front substrate has uneven portions, and the aperture ratio is greatly improved. Fourth, a thin film partition wall is formed on the front substrate, Since the spacers in the form of beads are arranged, more space is provided to allow the gas present in the exhausting process to be discharged. Accordingly, even if the exhaust process time is shorter than in the conventional case, the space through which the gas can escape is sufficiently widened, so that there is no problem in maintaining the vacuum degree of the plasma display device. Thus, the process time of the plasma display device can be shortened.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (4)

Front substrate; A plurality of common electrodes and scan electrodes alternately formed on the lower surface of the front substrate; A dielectric layer coated on a lower surface of the front substrate to fill the common electrode and the scan electrode; A rear substrate installed to face the front substrate; A strip-shaped address electrode disposed on the rear substrate to intersect the common and scan electrodes; A phosphor layer formed on the address electrode along the address electrode; A strip-shaped barrier rib dielectric layer formed of a dielectric material so as to protrude from a lower surface of the dielectric layer to a non-discharge region between the phosphor layers; And And a plurality of spacers interposed between the barrier dielectric layer and the back substrate. The method of claim 1, And a passivation layer formed on a surface of the barrier dielectric layer. The method of claim 1, And the spacer is spherical. The method of claim 1, And the concave-convex portion having the concave portion and the concave portion in the longitudinal direction of the common electrode and the scan electrode.