KR100369073B1 - Plasma display panel - Google Patents

Abstract

According to the invention, the front substrate; First and second electrodes formed in parallel with the inside of the front substrate; A dielectric layer formed inside the front substrate to cover the first electrode and the second electrode; A back substrate facing the front substrate; A third electrode formed on an inner surface of the rear substrate so as to be perpendicular to the first electrode and the second electrode; A dielectric layer formed on an inner surface of the rear substrate to cover the third electrode; Barrier ribs formed in parallel to form discharge cells on the dielectric layer of the rear substrate; In the plasma display panel comprising a phosphor applied between the partition wall, there is further provided a coating formed by applying a thermally conductive material in a predetermined pattern on the surface of the front glass 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 panel, and more particularly, to a plasma display panel in which heat emission from a front substrate is effectively performed and image contrast is improved.

In a plasma display panel, a discharge is generated in a gas between the electrodes by a direct current or an alternating voltage applied to the electrode, and the image is displayed by exciting the phosphor by radiation of ultraviolet light accompanying thereto.

FIG. 1 is a schematic exploded perspective view of a structure of a general AC plasma display panel.

Referring to the drawings, a first electrode 13X, which is a common electrode, and a second electrode 13Y, which is a scan electrode, are formed in pairs on an inner surface of the front glass substrate 11, and a back glass substrate is formed. A third electrode 13A, which is an address electrode, is formed on the inner surface of (12). The first electrode 13X, the second electrode 13Y, and the third electrode 13A are formed in a strip shape on the inner surfaces of the front glass substrate 11 and the back glass substrate 12, respectively, and the substrate 11, 12) cross each other at right angles when assembled. The dielectric layer 14 and the protective layer 15 are sequentially stacked on the inner surface of the front glass substrate 11. On the other hand, in the back glass substrate 12, the partition 17 is formed on the upper surface of the dielectric layer 14 ', and the cell 19 is formed by the partition 17. The cell 19 is filled with an inert gas such as argon. In addition, the phosphor 18 is applied to a predetermined portion inside the partition wall 17 forming each cell 19. Each cell 19 is coated with phosphors 18 corresponding to the pixels of red (R), green (G), and blue (B). Bus electrodes 13B are formed on one side of the first and second electrodes 13X and 13Y. A light emitting region is formed between the pair of first and second electrodes 13X and 13Y, and a non-light emitting region is formed between the light emitting regions, and a black matrix 9 is formed in the non-light emitting region.

Referring to the operation of the plasma display panel as described above, first, a so-called trigger voltage is applied to cause a discharge between the second electrode 13Y and the third electrode 13A. Discharge occurs when cations are accumulated in the dielectric layer by the trigger voltage. When the trigger voltage exceeds the threshold voltage, the argon gas charged in the cell 19 becomes a plasma state, and a stable discharge state can be maintained between the adjacent first electrode 13X and the second electrode 13Y. have. At this time, the light of the ultraviolet region in the discharge light impinges upon the phosphor 18 and emits light, and thus each pixel formed for each cell 19 can display an image.

When the panel having the above structure is operated, high temperature heat is generated, and heat is emitted to the outside through the front substrate and the rear substrate. If the heat dissipation of the panel is not effective, not only the image quality is deteriorated but also the life of the panel is shortened. Typically, the heat released through the back substrate is discharged through the chassis installed in close proximity to the back substrate, and the cooling fan also helps to release the heat. On the other hand, no appropriate cooling means are provided for the front glass substrate 11. In one example, attempts are made to dissipate heat by flowing a coolant over the entire surface of the front glass substrate, but such a method is not suitable because the image is distorted due to the flow of the coolant.

On the other hand, the black matrix 9 is formed corresponding to the non-light emitting area between adjacent unit discharge cells, thereby preventing crosstalk and improving contrast, but does not prevent the influence of external light incident from the outside of the panel. That is, the black matrix 9 can prevent mutually interfering light from the inside of the panel, while failing to prevent interference generated when external light is reflected from the surface of the front glass substrate 11. .

The present invention has been made to solve the above problems, an object of the present invention is to provide a plasma display panel provided with a suitable cooling means on the front substrate.

Another object of the present invention is to provide a plasma display panel with improved contrast.

1 is a schematic exploded perspective view of a typical plasma display panel.

2 is a schematic exploded perspective view of a first embodiment of a plasma display panel according to the present invention;

3 is a schematic perspective view of part of a second embodiment of a plasma display panel according to the present invention;

4 is a perspective view schematically showing a device for wire coating;

<Brief Description of Major Codes in Drawings>

11.Front glass substrate 12.Rear glass substrate

13X, 13Y, 13A, 13B. Electrode 14.14 '. Dielectric layer

17. Bulkhead 18. Phosphor

19. Cell 21. Coating

22. Bulkhead counterpart 23. Non-light emitting area counterpart

31. Coated Wire 32. Wire

33. Coating

In order to achieve the above object, according to the present invention, a front substrate; First and second electrodes formed in parallel with the inside of the front substrate; A dielectric layer formed inside the front substrate to cover the first electrode and the second electrode; A back substrate facing the front substrate; A third electrode formed on an inner surface of the rear substrate so as to be perpendicular to the first electrode and the second electrode; A dielectric layer formed on an inner surface of the rear substrate to cover the third electrode; Barrier ribs formed in parallel to form discharge cells on the dielectric layer of the rear substrate; In the plasma display panel having a phosphor applied between the partition wall, there is further provided a coating formed by applying a thermally conductive material in a predetermined pattern on the surface of the front glass substrate.

According to another feature of the invention, the coating portion is formed in a lattice shape directly on the upper portion of the partition wall and the non-light emitting region formed between the pair of first and second electrodes.

Also according to the present invention, the front substrate; First and second electrodes formed in parallel with the inside of the front substrate; A dielectric layer formed inside the front substrate to cover the first electrode and the second electrode; A back substrate facing the front substrate; A third electrode formed on an inner surface of the rear substrate so as to be perpendicular to the first electrode and the second electrode; A dielectric layer formed on an inner surface of the rear substrate to cover the third electrode; Barrier ribs formed in parallel to form discharge cells on the dielectric layer of the rear substrate; A plasma display panel comprising: a phosphor coated between the partition walls, wherein the plasma display panel is provided by bringing a coating wire coated with a thermal conductive material into close contact with a surface of the front glass substrate.

According to another feature of the invention, the coating wire extends directly above the non-light emitting region formed between the pair of first and second electrodes.

According to another feature of the invention, the thermally conductive material is any one of carbon, silicone rubber, dichroic mirrors.

Hereinafter, the present invention will be described in more detail with reference to an embodiment shown in the accompanying drawings.

2 is a schematic perspective view of a first embodiment of a plasma display panel according to the present invention.

Referring to the drawings, the structure of the overall panel is similar to that of the conventional panel shown in Fig. 1, and the same components are denoted by the same reference numerals. That is, the first electrode 13X and the second electrode 13Y are formed in parallel on the inner surface of the front glass substrate 11, and the dielectric layer 14 and the protective layer 15 are sequentially stacked thereon. Third electrodes 13A, which are address electrodes, are formed in parallel on the inner surface of the rear glass substrate 12, and a dielectric layer 14 'is formed thereon. Discharge cells 19 are formed by forming barrier ribs 17 in parallel on the dielectric layer 14 ′, and phosphors 18 corresponding to red, green, and blue are coated between the barrier ribs 17. Bus electrodes 13B are formed on the first and second electrodes 13X and 13Y.

According to one feature of the invention, the coating portion 21 of a predetermined pattern is coated on the surface of the front glass substrate 11. The coating part 21 may serve to release heat and improve contrast inside the panel through the front glass substrate 11. That is, by forming the coating portion 21 in the predetermined pattern on the front glass substrate 11 by using a material having good thermal conductivity, it is possible to perform effective heat dissipation. It is also possible to improve the contrast by having the coating material have a dark color, for example black, to absorb light well.

As the coating material, for example, carbon, silicone rubber, or dichroic mirror, etc., materials are excellent in thermal conductivity, so that heat emitted through the front substrate can be effectively released into the atmosphere.

As shown in FIG. 2, the coating part 21 has a predetermined lattice shape formed of the partition counterpart 22 and the non-light emitting area counterpart 23. The partition correspondence part 22 is a part extended in the position corresponding to the immediate upper part of the partition 17. The non-light emitting area counterpart 23 is a portion corresponding to the area formed directly above the non-emissive area formed between the pair of first and second electrodes 13X and 13Y, and is described with reference to FIG. 1. It is a portion corresponding to the upper portion of the black matrix 9. The grating formed by the partition wall corresponding part 22 and the non-light emitting area corresponding part 23 of the coating part 21 eventually has a shape for distinguishing the unit discharge cells.

The plasma display panel having the coating portion 21 formed as above is advantageous in terms of heat emission and contrast. Since the coating part 21 has excellent thermal conductivity, it is possible to quickly dissipate heat emitted through the front glass substrate 11 of the panel to the outside, and is also applied to the upper portion of the non-light emitting area so that the light inside the panel crosstalks. At the same time, external light can be prevented from interfering on the surface of the front glass substrate 11. The coating part 21 as a whole has a side effect of preventing glare caused by external light reflected from the surface of the front glass substrate 11.

3 is a schematic perspective view of another embodiment of a plasma display panel according to the present invention.

Referring to the drawings, the structure of the overall panel is similar to that of the conventional panel shown in Fig. 1, and the same components are denoted by the same reference numerals. In particular, the inner surface structure of the back substrate 12 is similar to that shown in FIGS. 1 and 2.

According to another feature of the invention, the coating wire 31 is provided on the surface of the front glass substrate 11. The coating wire 31 has a coating portion 33 formed by applying a coating material to the surface of the wire 32. The coating wire 33 is installed by adhering the end portion to one side 34 of the front glass substrate 11 while being in close contact with the front glass substrate as shown in the figure.

The coating wire 31 should be installed in correspondence with the upper portion of the non-light emitting area of the panel. That is, as described above, it should be provided directly above the non-light emitting region formed between the pair of first and second electrodes 13X and 13Y.

As the material for forming the coating part 33, carbon, silicone rubber, dichroic mirror, etc. having excellent thermal conductivity may be used as mentioned above. Such a coating material may be coated on the surface of the wire through the apparatus shown in FIG. 4.

Referring to FIG. 4, the coating liquid filling part 42 is formed inside the container 41. In addition, although not shown in the figure, the bottom surface of the container 41 is formed with a plurality of through holes slightly larger than the diameter of the wire 45 so that one strand of the wire 46 can pass through. The coating liquid injection hole 43 is formed at the side of the container 41, and the coating liquid may be injected into the container 41 through the injection hole 43.

Since the coating material filled in the container 41 is a viscous material, it does not completely leak through the through hole formed in the bottom surface of the container 41. While the wire 46 is fed from the top of the container 41 and passed through the bottom through hole, the surface of the wire 46 is coated with a coating liquid. Designated by reference numeral 45 is a coated wire having a surface coated.

Referring back to FIG. 3, the coating wire 31 provided corresponding to the non-light emitting area not only prevents crosstalk between the light emitting areas, but also interferes with light generated on the surface of the front glass substrate 11 by external light. Can be prevented. In addition, since the wire 32 and the coating part 33 have excellent thermal conductivity, heat dissipation through the front glass substrate 11 may be effectively performed.

The plasma display panel according to the present invention has an advantage of effectively dissipating heat through the front glass substrate by providing a simple heat conduction means on the surface of the front glass substrate. In addition, there is an advantage that the contrast of the panel is improved by the heat conduction means.

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

Claims (5)

Front substrate; First and second electrodes formed in parallel with the inside of the front substrate; A dielectric layer formed inside the front substrate to cover the first electrode and the second electrode; A back substrate facing the front substrate; A third electrode formed on an inner surface of the rear substrate so as to be perpendicular to the first electrode and the second electrode; A dielectric layer formed on an inner surface of the rear substrate to cover the third electrode; Barrier ribs formed in parallel to form discharge cells on the dielectric layer of the rear substrate; A plasma display panel comprising: a phosphor coated between the barrier ribs; And a coating part formed by applying a thermally conductive material in a predetermined pattern on a surface of the front glass substrate. The plasma display panel of claim 1, wherein the coating part is formed in a lattice shape directly above the partition wall and directly on a non-light emitting area formed between the pair of first and second electrodes. . Front substrate; First and second electrodes formed in parallel with the inside of the front substrate; A dielectric layer formed inside the front substrate to cover the first electrode and the second electrode; A back substrate facing the front substrate; A third electrode formed on an inner surface of the rear substrate so as to be perpendicular to the first electrode and the second electrode; A dielectric layer formed on an inner surface of the rear substrate to cover the third electrode; Barrier ribs formed in parallel to form discharge cells on the dielectric layer of the rear substrate; A plasma display panel comprising: a phosphor coated between the barrier ribs; And a coating wire coated with a thermally conductive material on the surface of the front glass substrate in close contact with the plasma display panel. 4. The plasma display panel of claim 3, wherein the coating wire extends directly above a non-light emitting region formed between the pair of first and second electrodes. 4. The plasma display panel of claim 1 or 3, wherein the thermally conductive material is any one of carbon, silicone rubber, and dichroic mirrors.