KR20000003711A - Plasma display panel and method thereof - Google Patents

Abstract

PURPOSE: A plasma display panel and method thereof are provided to maximize a contrast of the panel by preventing an optical cross-talk between cells. CONSTITUTION: A plasma display panel comprises a front substrate(31); a plurality of transparent electrodes(32) formed on the front substrate(31); a black matrix(33) formed in spaced apart from the transparent electrodes(32) and formed by a unit cell; and a bus electrode(34) formed between the transparent electrode(32) and the black matrix(33). An open region formed between the cells is completely closed by using the bus electrode(34), thereby preventing the optical cross-talk between cells.

Description

Plasma Display Panel and Manufacturing Method Thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel and a method for manufacturing the same, and more particularly, to a plasma display panel and a method for manufacturing the same in which the structure and manufacturing method are improved to increase contrast.

The plasma display panel is used to display an image using a gas discharge phenomenon, and can be divided into an AC type and a DC type by a discharge mechanism. The DC type means that each electrode constituting the plasma display panel is directly exposed to the gas layer encapsulated in the discharge cell, and the voltage applied thereto is applied to the discharge gas layer as it is. The charged particles generated during the discharge phenomenon are separated and the electrodes do not absorb and form wall charges, and the next discharge is generated by using the wall charges.

In addition, according to the number of electrodes formed in the discharge cells of the plasma display panel, it is classified into two-electrode type, three-electrode type, and four-electrode type. The two-electrode type has two electrodes for addressing and sustaining. The voltage is applied together, and the three-electrode type is also called a surface discharge type, and is switched or maintained by a voltage applied to an electrode located on the side of the discharge cell.

1 shows a schematic cross-sectional view of a portion of a plasma display panel as described above.

Referring to FIG. 1, a transparent electrode 12 having a predetermined pattern is formed on a front substrate 11 that is coupled to a partitioned substrate (not shown) to form a discharge space. The transparent electrode 12 is formed on an upper surface of the transparent electrode 12. The bus electrodes 13 are formed in parallel directions. The bus electrode 13 formed on the upper surface of the transparent electrode 12 is formed to have a width narrower than the width of the transparent electrode 12, and the front substrate 15 having the transparent electrode 12 and the bus electrode 13 formed thereon. On the upper surface of the transparent dielectric layer 14 is formed. The protective layer 15 is sequentially stacked on the transparent dielectric layer 14. The protective layer 15 is generally made of MgO.

In addition, a black matrix 16 is formed between the cells, that is, between the transparent electrodes 12 to prevent mutual interference of light formed from each pixel and to secure high contrast as the panel is enlarged. At this time, an open area, which is a predetermined gap, is formed between the formed black matrix 16 and the transparent electrode 12.

However, the open area formed as described above adversely affects the contrast of the panel. Therefore, as shown in FIG. 2, the open area of FIG. 1 is completely covered with the black matrix 26 to cover the area between the cells and the transparent electrode to secure high contrast of the panel.

As described above, in the conventional method of manufacturing a plasma display panel, the black matrices 16 and 26 are glass frits containing a large amount of PbO, and Mn and Cu oxides are used as black pigment components. It contains. In addition, the Sn in the transparent electrode 22 greatly increases the solubility of the above-described pigment component, so that when the black matrix 26 or the transparent dielectric layer 24 is fired, the transparent electrode 22 and the lower surface of the transparent electrode 22 are lowered. The substrate 21 is colored black. As a result of such a problem, the black matrix 16 and the transparent electrode 12 must be formed at regular intervals as shown in FIG. 1.

However, in such a case, it is difficult to maximize the contrast of the panel because optical cross talk between the cells is not sufficiently prevented.

The present invention was created in order to solve the above problems, the plasma display panel can be manufactured to ensure high contrast of the screen by completely forming a cell between the cells with a black matrix without adversely affecting the transparent electrode The purpose is to provide a method.

Another object of the present invention is to provide a method of manufacturing a plasma display panel which prevents black color from occurring on the front substrate by changing the arrangement of electrodes formed on the front substrate.

1 is a schematic partial cross-sectional view showing one embodiment of a plasma display panel according to the prior art.

Figure 2 is a schematic partial cross-sectional view showing another embodiment of a plasma display panel according to the prior art.

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

4 is a schematic partial cross-sectional view showing another embodiment of a plasma display panel according to the present invention.

<Description of the symbols for the main parts of the drawings>

31, 41. Front substrate 32, 42. Transparent electrode

33, 44. Black matrix 34, 43. Bus electrodes

35. Transparent dielectric layer 36. Protective layer

37. Address electrode 38. Bulkhead

39. Substrate

Plasma display panel of the present invention for achieving the above object, the front substrate; Transparent electrodes formed in a predetermined pattern on an upper surface of the front substrate; A black matrix formed at predetermined intervals from the transparent electrodes to partition one cell; And a bus electrode formed between the transparent electrode and the black matrix.

In the present invention, the bus electrode is preferably formed to the upper edge of the transparent electrode and the black matrix.

Plasma display panel manufacturing method of the present invention for achieving the above object comprises the steps of forming a plurality of transparent electrodes on the upper surface of the front substrate; Forming a black matrix at a predetermined distance from the transparent electrode between the transparent electrodes in which one cell is divided; And forming a bus electrode of a predetermined pattern in the gap formed between the transparent electrode and the black matrix.

Another plasma display panel manufacturing method of the present invention for achieving the above object comprises the steps of forming a plurality of transparent electrodes on the upper surface of the front substrate; Forming a bus electrode on an upper surface of the front substrate to extend with one end of the transparent electrode; And forming a black matrix on the front substrate between the bus electrode partitioning one cell and the other bus electrode.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 shows one schematic perspective view of an embodiment of a plasma display panel according to the invention, and FIG. 4 shows another schematic embodiment of the plasma display panel according to the invention in partial schematic cross sectional view.

Referring to the drawings, each plasma display panel according to the present invention includes a plurality of transparent electrodes 32 and 42 formed on a top surface of the front substrates 31 and 41 in a predetermined pattern, and the transparent electrodes 32 and 42. Black matrixes 33 and 44 formed at predetermined intervals to define one cell, and bus electrodes 34 and 43 formed between the transparent electrodes 32 and 42 and the black matrix 33 and 44. It includes.

Here, the bus electrode 34 of FIG. 3 may be formed to the upper edge of the transparent electrode 32 and the black matrix 33, and the black matrix 44 of FIG. 4 may be formed to the upper surface of the bus electrode 43. do. However, the bus electrode 34 of FIG. 3 and the black matrix 44 of FIG. 4 formed as described above may be variously formed in addition to the shapes formed in the drawings.

A transparent dielectric layer 35 and a protective layer 36 made of MgO are formed on the transparent electrode 32, the black matrix 33, and the bus electrode 34, respectively. The front substrate 31 formed as described above is combined with the substrate 39 on which the address electrode 37 and the partition wall 38 are formed to form a discharge space.

And the manufacturing method of the plasma display panel according to the invention formed as described above is as follows. First, referring to FIG. 3, a plurality of transparent electrodes 32 are formed on one surface of the front substrate 31. Subsequently, when one transparent electrode 32 and the other transparent electrode 32 are gathered to form a predetermined pixel or cell, one transparent electrode 32 and the other transparent electrode 32 which divide the cell are divided. The black matrix 33 is formed on the front substrate 31 between the transparent electrodes 32 at predetermined intervals. A bus electrode 34 is formed between the black matrix 33 and the transparent electrode 32 formed as described above. In this case, the transparent electrode 32, the black matrix 33, and the bus electrode 34 are formed in a stripe shape with respect to the front substrate 31.

In particular, in forming the bus electrode 34, the bus electrode 34 is formed while completely closing the gap formed between the transparent electrode 32 and the black matrix 33, and the bus electrode 34 is A kind of partition wall is formed between the above-described distance between the transparent electrode 32 and the black matrix 33 over the upper surface of the transparent electrode 32 and the black matrix 33.

The transparent dielectric layer 35 and the protective layer 36 made of MgO are formed on the transparent electrode 32, the black matrix 33, and the bus electrode 34. The front substrate 31 formed as described above is combined with the substrate 39 on which the address electrode 37 and the partition wall 38 are formed to form a discharge space.

And the manufacturing method of another embodiment of the plasma display panel according to the present invention will be described with reference to FIG.

Referring to FIG. 4, a plurality of transparent electrodes 42 are formed on the front substrate 41. Subsequently, bus electrodes 43 are formed on one end surfaces of the transparent electrodes 42. The black matrix 44 is formed on the front substrate 41 between the bus electrodes 43. In forming the bus electrode 43, the bus electrode 43 is formed at a predetermined height over the upper surface of the transparent electrode 42 and the front substrate 41. In forming the black matrix 44, the black matrix 44 is completely closed between one bus electrode 43 and the other bus electrode 43 on the front substrate 41 partitioning one cell. If the black matrix 44 is formed up to the upper surface of the bus electrode 43, the bus electrodes 43 can be closed more reliably.

Subsequently, the transparent dielectric layer 45 and the protective layer 46 are formed on the transparent electrode 42, the bus electrode 43, and the black matrix 44. In addition, another substrate (39 in FIG. 3) that is combined with the front substrate 41 to form a discharge space has the same manufacturing method and configuration as in FIG. 3.

The plasma display panel manufactured as described above may be formed between one cell and another cell by varying the method of forming the transparent electrodes 32 and 42, the bus electrodes 34 and 43, and the black matrix 33 and 44. Close the space completely. First, as shown in FIG. 3, since an open area (see FIG. 1) formed between the transparent electrode 32 and the black matrix 33 described above with reference to FIG. 1 is formed with different arrangements of the bus electrodes 34. Closed. As shown in FIG. 4, the area of the bus electrode 43 is extended to extend to the upper surface of the front substrate 41, so that not only the aforementioned open area is closed but also the transparent electrode 42 and the black matrix 44. The front substrate is prevented from being colored black at one side of the transparent electrode 42 according to the contact. Therefore, the above-mentioned open area is closed so that optical crosstalk between cells is sufficiently prevented to maximize the contrast of the panel.

The method of manufacturing a plasma display panel according to the present invention as described above has the following effects.

first; The open area formed between the cells is completely closed to prevent optical crosstalk between these cells. This can maximize the contrast of the panel.

second; Since the bus electrode and the black matrix are not in direct contact with the transparent electrode and the black matrix, the phenomenon of coloring the black color of the front substrate due to the contact with the transparent electrode and the black matrix can be prevented.

third; Increasing the cross-sectional area of the bus electrode also reduces the resistance.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (6)

Front substrate; Transparent electrodes formed in a predetermined pattern on an upper surface of the front substrate; A black matrix formed at predetermined intervals from the transparent electrodes to partition one cell; And And a bus electrode formed between the transparent electrode and the black matrix. The method of claim 1, And the bus electrode is formed to an upper edge of the transparent electrode and the black matrix. The method of claim 1, And the black matrix is formed up to an upper surface of the bus electrode. Forming a plurality of transparent electrodes on an upper surface of the front substrate; Forming a black matrix at a predetermined distance from the transparent electrode between the transparent electrodes in which one cell is divided; And And forming a bus electrode having a predetermined pattern in the gap formed between the transparent electrode and the black matrix. Forming a plurality of transparent electrodes on an upper surface of the front substrate; Forming a bus electrode on an upper surface of the front substrate to extend with one end of the transparent electrode; And And forming a black matrix on the front substrate between the bus electrode partitioning one cell and the other bus electrode. The method of claim 5, In forming the black matrix, And the black matrix is formed to be completely filled between the bus electrodes.