KR20000044639A - Back panel of plasma display device having double barrier rib structure - Google Patents

Abstract

PURPOSE: A back panel of plasma display device having double barrier rib structure is provided to clearly divide a discharge cell and periphery non-selected cell of the discharge cell, thereby enhancing image quality and easily phosphor. CONSTITUTION: A back panel of plasma display device having double barrier rib structure comprises address electrodes(31) formed on the back panel(30), lattice type first barrier ribs(33) and stripe type second barrier ribs(34). The address electrodes(31) are formed by screen printing, PODEL method or sputtering method. The first barrier ribs(33) consist of first areas parallel to the address electrodes and second areas perpendicular to the first areas. The second barrier ribs(34) are formed to be parallel to the address electrodes on the first barrier ribs on both sides of the address electrodes(31)

Description

Back plate of plasma display device having a double partition structure

TECHNICAL FIELD The present invention relates to the field of plasma display device manufacturing, and more particularly, to a back plate of a plasma display device having a double partition structure.

Plasma display devices are devices that display letters or graphics using light emitted from plasma generated during gas discharge. Plasma display panel (PDP) has the most suitable advantages for large-scale display among various flat panel displays such as liquid crystal display (LCD), field emission display (FED), and electroluminescence display (ELD), which are being actively studied.

Plasma display devices can be enlarged to 40 GHz or larger, and CRT-level colorization is possible because of the use of a photoluminescence mechanism that emits visible light by stimulating a fluorescent film with ultraviolet rays generated from discharge. As a self-emissive display, it has many unique advantages not found in other flat devices, such as a wide viewing angle of 160 ° or more, and is a large-capacity for multimedia that combines the functions of next-generation high-definition wall-mounted TV, TV, and PC. As a display device, it is considered to have a strong interest in recent years.

PDP adopts a method of applying a suitable electrode and phosphor on each substrate by using two glass substrates having a thickness of about 3 mm, and forming a plasma in the space therebetween while maintaining an interval of about 0.1 mm to 0.2 mm. As a result, it can be enlarged as a flat plate. In addition, in the PDP, the gas discharge has a strong non-linearity in which discharge does not occur even when a voltage is applied between electrodes, and a super large panel having a memory function that is essential for driving a large display. Even in this case, a high quality image can be expressed without deteriorating the luminance.

Plasma display device is a direct current (DC type) in which the electrode for generating plasma is directly exposed to the plasma so that the conduction current flows directly through the electrode, and the electrode is covered with a dielectric and is not directly exposed. ) Is divided into the alternating current type (AC type).

Each of the DC Plasma Display Panel (DC PDP) and AC Plasma Display Panel (AC PDP) consists of a front panel, a back panel, and two glass substrates. A cathode is formed on the front plate of the anode, and an anode, a phosphor, a resistor, and a partition wall are formed on the back plate of the discharge plate. A discharge holding electrode, a bus electrode, a dielectric layer, and a protective film are formed on the front plate of the AC PDP. A partition and a phosphor layer are formed.

FIG. 1A is a plan view showing a back plate 1 structure of a conventional AC plasma display device having a stripe type partition wall 3A structure, and FIG. 1B is a lattice type partition wall structure 3B. It is a top view which shows the structure of the backplate 1 of the conventional AC plasma display element which has the following. FIG. 2 is a cross-sectional view showing a visible light emission state of a conventional plasma display panel having a stripe-shaped partition wall structure, and the back plate 1 shows a portion corresponding to a cross section along the line AA ′ of FIG. 1A. 1A, 1B and 2, reference numeral 2 denotes an address electrode, 10 denotes a front plate, 11 denotes a transparent electrode for sustaining discharge, and 12 denotes a bus electrode. '13' represents a dielectric layer.

As shown in FIGS. 1A and 2, the back panel structure of a conventional plasma display device having a stripe-shaped partition wall emits visible light not only in the discharge cell but also in the vicinity of the discharged display cell. That is, the distinction between the discharged cells and the unselected cells around them is unclear and the image quality deteriorates.

In the case of the lattice-shaped partition wall, the partition wall surrounds the cell, and there is no unclear problem of distinguishing the discharged cells and the surrounding cells such as the stripe-shaped partition wall, but the process is not easy because the phosphors should be formed in the lattice shape.

The present invention devised to solve the above problems can clearly distinguish the discharged cells and the unselected cells around them, thereby improving image quality, and having a double barrier rib structure having easy formation of phosphors. The purpose is to provide a back plate of.

1A is a plan view showing a back plate structure of a conventional AC plasma display device having a stripe-shaped partition wall structure;

1B is a plan view showing a back plate structure of a conventional AC plasma display device having a lattice-shaped partition wall structure;

2 is a cross-sectional view showing a visible light emission state of a conventional plasma display device;

3A is a plan view showing a back plate structure of a plasma display device having a double partition structure according to an embodiment of the present invention;

3B is a cross-sectional view along the line B-B 'of FIG. 3A;

4 is a cross-sectional view showing a visible light emission state of a plasma display panel having a double partition structure according to the present invention.

* Explanation of reference numerals for the main parts of the drawings

30: back plate 31: address electrode

32: white back 33: lattice type first bulkhead

34: striped second bulkhead

The present invention for achieving the above object is a plasma display panel (plasma display panel) consisting of a front plate and a back plate, the address electrode (address electrode) formed on the back plate; A lattice type first barrier rib formed on the rear plate to separate neighboring cells; A stripe type second barrier rib formed on the lattice first barrier rib in a direction parallel to the address electrode; And a phosphor layer formed on the lattice-shaped first partition wall and the stripe-shaped second partition wall.

The present invention provides a back plate of a plasma display device including a grid-shaped first partition wall and a stripe-shaped second partition wall formed on both sides of the address electrode in a direction parallel to the address electrode direction.

Figure 3a is a plan view showing the back plate 30 structure of the plasma display device having a double partition structure according to an embodiment of the present invention, screen printing on the back plate 30, such as glass (glass), A lattice consisting of an address electrode 31 formed by a method such as FODEL method or sputtering, a first region parallel to the address 31 electrode, and a second region perpendicular to the first region. type) A stripe type second barrier rib 34 is formed on the first barrier rib 33 on both sides of the first barrier rib 33 and the address electrode 31 in a direction parallel to the address electrode 31. have.

The address electrode 31 may be formed on the lower dielectric layer formed on the back plate 30 by screen printing or laminating, or may form a white back on the address electrode. . On the other hand, the grid-shaped first partition wall 33 is formed by a sand blast (Sand Blast), a lift-off (Lift-Off) method, the height of the grid-shaped first partition wall 33 and the stripe-shaped second partition wall The height of the grid-shaped first partition wall in the total partition height combined with the height of (34) is 1/100 to 9/10 of the height of the entire partition wall.

FIG. 3B is a cross-sectional view along the line B-B 'of FIG. 3A, and reference numeral 32 denotes a white back. The white back 32 serves as a dielectric to reflect light from the phosphor to increase brightness and to control the thickness of the non-uniform phosphor and the rough surface of the phosphor.

4 is a cross-sectional view showing a visible light emission state of a plasma display panel having a double partition structure according to the present invention, and the back plate 30 corresponds to a cross section along the line B-B 'of FIG. 3A. In FIG. 4, reference numeral 40 denotes a front plate, 41 denotes a transparent electrode for maintaining discharge, 42 denotes a bus electrode, and 43 denotes a dielectric layer.

When visible light is emitted from the phosphor by ultraviolet rays in the cell to be discharged, as shown in FIG. 4, the first grid 33 blocks the visible light from being emitted to neighboring cells. That is, the visible light emitting region is limited to only the discharge cell region, so that the effect of the cell to be displayed on other cells can be reduced.

In addition, since the second barrier rib is formed to form a phosphor more easily than a back structure having a single lattice, and the first barrier rib is present, the phosphor coating area is increased by the surface area, thereby increasing the amount of visible light emitted from the ultraviolet light. do. Therefore, it can contribute to the improvement of brightness.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

According to the present invention made as described above, the image quality can be improved by configuring the plasma display panel with a back plate of a double partition structure consisting of a lattice partition and a stripe partition. In addition, a structure capable of easily applying the phosphor can be obtained, and the surface area of the lattice is increased, thereby increasing the phosphor coating area, which can result in improved luminance.

Claims (3)

In the plasma display panel consisting of a front plate and a back plate, An address electrode formed on the back plate; A lattice type first barrier rib formed on the rear plate to separate neighboring cells; A stripe type second barrier rib formed on the lattice first barrier rib in a direction parallel to the address electrode; And Phosphor layer formed on the grid-shaped first partition wall and the striped second partition wall Plasma display panel comprising a. The method of claim 1, The grid-shaped first partition wall, And a second area parallel to the address electrode and a second area perpendicular to the first area. The method according to claim 1 or 2, The height of the grid-shaped first partition wall is the sum of the height of the grid-shaped first partition wall and the stripe-shaped second partition wall, wherein the height of the grid-shaped first partition wall is 1/100 to 9/10 of the height of the entire partition wall plasma display panel. .