KR100719000B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel, comprising a first black layer formed on a horizontal partition wall and a second black layer formed corresponding to an upper portion of the vertical partition wall so as to intersect the first black layer. The width is characterized in that it is formed narrower than the width of the vertical bulkhead.

According to the present invention, the width of the black layer is formed to be narrower than the width of the partition wall, thereby reducing the blocking of visible light and securing a discharge space.

Plasma Display Panel, Black Layer, Horizontal Bulkhead, Vertical Bulkhead

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

1 is a block diagram showing a conventional plasma display panel.

2 is a cross-sectional view schematically illustrating a structure of a black layer formed on a rear panel partition of a conventional plasma display panel.

3 is a plan view schematically showing the structure of a black layer formed on a conventional plasma display panel.

4A and 4B illustrate structures of a black layer formed on a plasma display panel according to an embodiment of the present invention.

5A and 5B illustrate structures of a black layer formed on a plasma display panel according to another 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 which is intended to reduce the blocking of visible light by improving the structure of the black layer formed on the partition wall.

In general, a plasma display panel has a partition wall formed between a soda-lime glass front panel and a rear panel, which constitutes one discharge cell, and in each discharge cell helium-xenon (He-Xe), helium- When an inert gas such as neon (He-Ne) is discharged by a high frequency voltage, vacuum ultraviolet rays (Vacuum Ultraviolet rays) are generated to emit the phosphor formed between the partition walls to implement an image.

1 is a block diagram showing a conventional plasma display panel.

As illustrated in FIG. 1, in the plasma display panel, the front panel 100, which is a display surface on which an image is displayed, and the rear panel 110 forming a rear surface are coupled in parallel with a predetermined distance therebetween.

The front panel 100 is configured by arranging a plurality of sustain electrodes composed of the scan electrode 102 and the sustain electrode 103 on the front glass 101. Each of the scan electrode 102 and the sustain electrode 103 is composed of transparent electrodes 102a and 103a formed of a transparent indium tin oxide (ITO) material and bus electrodes 102b and 103b made of a metal material, thereby forming one discharge cell. Mutual discharge is caused in the interior, and light emission of the discharge cells is maintained.

The scan electrode 102 and the sustain electrode 103 are covered by one or more upper dielectric layers 104 that limit the discharge current and insulate the electrode pairs, and to facilitate the discharge conditions on the upper dielectric layer 104 top surface. Usually, a protective layer 105 on which magnesium oxide (MgO) is deposited is formed.

The rear panel 110 is configured by arranging a plurality of discharge spaces, that is, a stripe type (or well type) partition wall 112 in parallel on the rear glass 111 to form a discharge cell. In addition, a plurality of address electrodes 113 that perform address discharge to generate vacuum ultraviolet rays are disposed in parallel with the partition wall 112. On the upper side of the rear glass 110, R, G, and B phosphors 114 which emit visible light for displaying an image upon address discharge are coated. A lower dielectric layer 115 is formed between the address electrode 113 and the phosphor 114 to protect the address electrode 113.

2 is a cross-sectional view schematically illustrating a structure of a black layer formed on a rear panel partition of a conventional plasma display panel.

As shown in FIG. 2, the black layer 106a formed on the partition wall 112 of the conventional rear panel is formed wider than the partition wall 112 or has the same width. However, there is a problem in that the alignment process is difficult when forming the black layer 106a wider than the width on the narrow vertical partition wall 112.

3 is a plan view schematically illustrating a structure of a black layer formed in a conventional plasma display panel.

Referring to FIG. 3, in the front panel included in a conventional plasma display panel, transparent electrodes 102a and 103a and bus electrodes 102b and 103b of a sustain electrode are formed, and a black layer is formed on an ineffective surface between the sustain electrodes. 106b is formed.

The black layer 106b functions to block light by absorbing external light generated from the outside of the front glass to reduce reflection, and to improve color purity and contrast of the front glass.

That is, the plasma display panel having the structure as shown in FIG. 1 uses micro discharges, and the visible light is generated in the cells in which the discharges are generated. In order to spatially separate the neighboring cells, a barrier is formed between the cells and the cells. A rib 112 is formed, and the black layer 106b prevents unnecessary light from being discharged from the upper portion of the partition wall 112 so that the contrast characteristic of the plasma display panel is lowered.

However, when the black layer having the same width as the barrier rib is formed on the barrier rib, the reflectivity of the barrier rib of the visible light generated inside the cell is lowered, thereby reducing the amount of visible light emitted. Accordingly, there is a demand for a technique for optimizing the areas of the horizontal and vertical black layers formed in the plasma display panel.

Therefore, in order to solve the above problems, the width of the black layer is formed to be narrower than the width of the vertical partition wall, and the width of the black layer formed to correspond to the horizontal partition wall is minimized to reduce the blocking of visible light, thereby reducing the discharge space. It is an object of the present invention to provide a plasma display panel that can be secured.

The plasma display panel according to the present invention for solving the above technical problem, the first black layer formed on the horizontal partition wall, and the second black layer formed corresponding to the upper portion of the vertical partition wall so as to cross the first black layer. Including, but the width of the second black layer is characterized in that the narrower than the width of the vertical partition wall.

The second black layer is formed at the center of the vertical partition wall, and the width is 50% or more and 90% or less with respect to the width of the vertical partition wall.

The second black layer is formed to be spaced apart from the first black layer by a predetermined distance, and the separation width is 10 μm or more and 100 μm or less.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

4A and 4B are plan views illustrating the structure of a black layer formed on a plasma display panel according to an embodiment of the present invention.

4A and 4B, the plasma display panel according to the exemplary embodiment of the present invention is not shown in the drawing, but as in the prior art, the front substrate, which is the display surface on which an image is displayed, and the rear substrate which forms the rear surface are spaced apart from each other. It is formed by bonding.

The front substrate includes a sustain electrode formed by pairing a scan electrode and a sustain electrode on the front glass, and an upper dielectric layer is stacked on the front glass where the scan electrode and the sustain electrode are arranged in parallel to limit the discharge current. In addition, the upper dielectric layer is formed with a protective layer in which magnesium oxide (MgO) is deposited to prevent damage to the upper dielectric layer and to increase emission efficiency of secondary electrons by sputtering generated during plasma discharge.

The rear substrate is provided with an address electrode in a direction crossing the sustain electrodes arranged parallel to the upper part of the upper glass, and a lower dielectric layer is formed on the address electrode to accumulate wall charges. In addition, a partition wall partitioning the discharge cells is formed on the lower dielectric layer, and a fluorescent layer is applied to the discharge cell space to display visible light having any one of R (red), G (green), and B (blue) color during discharge. Will occur.

As shown in FIG. 4A, the partition wall formed in the plasma display panel having the above-described structure includes a horizontal partition wall 212a and a vertical partition wall 212b stacked on top of the lower dielectric layer 130b on the rear glass 200 to discharge the discharge cells. A black layer 206 is formed on the horizontal partition wall 212a and the vertical partition wall 212b. Here, the horizontal partition wall 212a is a partition wall for dividing into one unit pixel in a discharge space to which phosphors of the same color, for example, R only phosphors, G only phosphors or B only phosphors are applied, and vertical partitions 212b ) Refers to a partition wall for separating each of the R, G and B phosphors into unit pixels in a discharge space coated with R, G and B phosphors.

The first black layer 206a and the second black layer 206b are formed on the partition 212 so that the contrast characteristics of the plasma display panel are improved, and the material of the black layer 206 is contrasted to the conventional plasma display panel. The same material as that of the formed black matrix is sufficient to improve the properties.

In this case, the first black layer 206a formed on the horizontal partition wall 212a and the second black layer 206b formed corresponding to the upper portion of the vertical partition wall 212b to intersect the first black layer 206a are illustrated in FIG. Are connected to each other as shown in 4b. Here, the width of the second black layer 206b formed on the vertical partition 212b is formed to be narrower or the same as the width of the vertical partition 212b, and the width of the second black layer 206b is vertical. It is preferable that they are 50% or more and 90% or less with respect to the width | variety of the partition 212b.

Accordingly, alignment miss of the black layer 206b formed on the vertical partition wall 212b can be reduced, and the reflectance of the panel can be reduced. In addition, since the reflectance is lowered by the second black layer 212b formed on the vertical partition 212b, the width of the first black layer 212a formed on the horizontal partition 212a can be reduced, thereby increasing the aperture ratio. have.

5A through 5B illustrate the structure of a black layer formed on a plasma display panel according to another exemplary embodiment of the present invention.

As shown in FIG. 5A, a horizontal partition 312a and a vertical partition 312b are stacked on the lower dielectric layer 330b on the rear glass 300 to form a well type that partitions a discharge cell. The black layer 306 is formed on the horizontal partition 312a and the vertical partition 312b. The first black layer 306a and the second black layer 306b are formed on the well type barrier rib 312 so that the contrast characteristics of the plasma display panel are improved, and the material of the black layer 306 is a conventional plasma display. The same material as the material of the black matrix formed to improve the contrast characteristics in the panel is sufficient.

At this time, the first black layer 306a formed on the horizontal partition wall 312a and the second black layer 306b formed corresponding to the upper portion of the vertical partition wall 312b so as to intersect the first black layer 306a are illustrated in FIG. It is formed spaced apart from each other as shown in 5b. Here, the width of the second black layer 306b formed on the vertical partition 312b is formed to be narrower or the same as the width of the vertical partition 312b, and the width of the second black layer 306b is vertical. It is preferable that they are 50% or more and 90% or less with respect to the width | variety of the partition 312b.

In addition, according to another embodiment of the present invention according to FIG. 5, unlike the embodiment of FIG. 4, the first black layer 306a formed on the horizontal partition wall 312a and the second black layer formed on the horizontal partition wall 312b are different. 306b is formed so as to be spaced apart by a width of 10 µm or more and 100 µm or less. Thus, when the material forming the black layer is a material having conductivity that simultaneously performs the black role in the bus electrode, electrical stability may be ensured.

As described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features.

Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, the plasma display panel according to the present invention can reduce the alignment miss by forming the width of the black layer formed on the partition wall narrower than the width of the partition wall, and effectively secure the discharge space by reducing the blocking of visible light. It can work.

Claims (5)

A first black layer formed on the horizontal partition wall; A second black layer formed to correspond to the upper part of the vertical partition wall so as to intersect with the first black layer, The width of the second black layer is narrower than the width of the vertical partition wall plasma display panel. The method of claim 1, And the second black layer is formed at a central portion of the vertical partition wall. The method of claim 1, The width of the second black layer is 50% or more and 90% or less with respect to the width of the vertical partition wall. The method of claim 1, And the second black layer is spaced apart from the first black layer by a predetermined distance. The method of claim 4, wherein The said predetermined distance is 10 micrometers or more and 100 micrometers or less, The plasma display panel characterized by the above-mentioned.

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