KR100366101B1 - Plasma display panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, which aims to provide a plasma display device having a structure capable of simplifying a manufacturing process, eliminating the possibility of a short circuit of a sustain electrode, and ensuring the onset of stable discharge. A transparent front substrate sealed to the rear substrate to form a discharge space; And three main electrode portions formed in a stripe shape in parallel to each other in the discharge space formed by the rear substrate and the front substrate, and the width of the one positioned at the center is smaller than the width of the one positioned at both sides, and the three main electrodes. And at least one pair of sustain electrodes having a plurality of connection electrode portions interconnecting the electrode portions.

Description

Plasma display panel {Plasma display panel}

The present invention relates to a plasma display device, and more particularly, to a plasma display device having an improved sustain electrode.

Plasma display panels encapsulate gas on two substrates on which a plurality of electrodes are formed, and then apply a discharge voltage, and excite phosphors formed in a predetermined pattern by ultraviolet rays generated by the discharge voltage. Refers to a device that obtains letters or graphics.

Such a plasma display device is 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 can be classified into a counter discharge type and a surface discharge type according to the configuration of the 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, at least one electrode is surrounded by a dielectric layer, and discharge is performed by an electric field of wall charge instead of direct charge transfer between corresponding electrodes.

An example of a conventional AC surface discharge type plasma display device of the plasma display device is shown in FIG. 1.

Referring to FIG. 1, a typical AC surface discharge plasma display device includes a back substrate 10, first electrodes 11 formed in a predetermined pattern on the back substrate 10, and the first electrodes 11. The dielectric layer 12 filling the upper surface of the back substrate 11 on which the electrodes are formed, partition walls 13 formed on the dielectric layer 12 to maintain a discharge distance, and partitioned by the partition walls 13. A phosphor layer 19 formed on at least one side surface of the space, a front substrate 16 coupled to the rear substrate 10 to form a discharge cell, and the first electrode on the front substrate 16; 11 and the second electrode 14 and the third electrode 15 of a predetermined pattern formed to have a predetermined angle, and to reduce the line resistance on the second and third electrodes 14 and 15, respectively. The upper surface of the front substrate 16 on which the bus electrodes 14a and 15a, the second and third electrodes 14 and 15 and the bus electrodes 14a and 15a are formed are buried. Provided with a dielectric layer 17 and the dielectric layer 17 protective layer 18 formed on.

In the plasma display device configured as described above, the bus electrodes 14a and 15a formed on the second and third electrodes 14 and 15 to reduce the line resistance are formed from the phosphor layer 19. In order to minimize the blocking of the emitted light, it should be as thin as possible at the edges of the second and third electrodes 14a and 15a, and the bus electrodes 14a and 15a are made of indium tin oxide (ITO). The bus electrode may be formed on the second and third electrodes 14 and 15 by a complicated process such as a printing method using a metal material such as silver (Ag) paste or a photolithography method using a photosensitive film. The discoloration of the electrodes 14a) and 15a as well as the short circuit occurred.

The prior art for solving the above problem is shown in FIG. For convenience of illustration, in FIG. 2, only the partition wall 35 on the rear substrate (not shown) and the sustain electrodes 31 and 32 on the front substrate (not shown) are schematically illustrated.

As shown in FIG. 2, the conventional technique does not form the second and third electrodes, but forms sustain electrodes 31 and 32 in the region, but the sustain electrodes 31 and 32 are partition walls 35. Main electrode portions 31a, 31b, 31c, 32a, 32b, and 32c formed of three lines formed in parallel to and perpendicular to the direction, and the main electrode portions 31a, 31b, 31c ( A plurality of connections between 32a, 32b, and 32c that are located on the same line as the partition wall 35 and connect the main electrode portions 31a, 31b, 31c, 32a, 32b, and 32c. It consists of electrode parts 33 and 36. The prior art made as described above is a bus electrode formed on the second and third electrodes by forming only the sustain electrodes 31 and 32 having a plurality of openings 34 in the region without forming the second and third electrodes. In addition to fundamentally solving the possibility of discoloration of the bus electrode and the occurrence of a short circuit with the second and third electrodes in the formation process, the manufacturing process of the plasma display device was simplified and the manufacturing cost was greatly reduced. However, the conventional technique has the main electrode portions 31a, 31b, 31c, 32a and 32b in order to ensure the maximum aperture ratio for minimizing the luminance reduction caused by the wider the sustain electrodes 31 and 32. By forming the widths of the plurality of electrodes 32c as narrow as possible, there is a high risk that the main electrode portions 31a, 31b, 31c, 32a, 32b, and 32c are short-circuited and the main electrode portions 31a and 31b. Since the widths of the two main electrode portions 31c and 32c facing each other forming the discharge gap 37 among the (c) 31c, 32a, 32b and 32c are formed too narrow, respectively, the start of stable discharge is started. There was a problem that was difficult to secure.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to configure the sustain electrode while suppressing a decrease in luminance due to a decrease in aperture ratio in a plasma display device of a 3-line sustain electrode without an ITO electrode. The present invention provides a plasma display device in which the structure of the sustain electrode is improved to completely eliminate the possibility of short-circuit of the main electrode portion and to ensure stable initiation of discharge.

1 is an exploded perspective view showing the structure of a conventional plasma display device;

2 is a plan view schematically illustrating a structure of a sustain electrode in a conventional plasma display device;

3 is an exploded perspective view showing the structure of a plasma display device according to the present invention;

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

10, 30. Back substrate 11, 31. First electrode

12, 17, 32, 41. Dielectric layer 13, 33. Bulkhead

34. Phosphor layer 14, 15. Second and third electrodes

14a, 15a. Bus electrode 35, 36. Holding electrode

35a, 35b, 35c, 36a, 36b, 36c. Main electrode

35d, 36d. Connecting electrode part 37. Black mattress layer

16, 38. Front board 39. Opening

40. Discharge gap 18, 42. Protective layer

In order to achieve the above object, a plasma display device according to an aspect of the present invention, a rear substrate; A transparent front substrate sealed to the rear substrate to form a discharge space; And three main electrode portions formed in a stripe shape in parallel to each other in the discharge space formed by the rear substrate and the front substrate, and the width of the one positioned at the center is smaller than the width of the one positioned at both sides, and the three main electrodes. And at least one pair of sustain electrodes having a plurality of connection electrode portions interconnecting the electrode portions.

In addition, in the plasma display device according to another aspect of the present invention, among the three main electrode portions constituting the sustain electrodes, the width of the main electrode portion positioned farthest from the adjacent sustain electrodes forming the discharge electrode and the discharge cell is remaining. It is characterized in that it is wider than the width of the main electrode.

In addition, the sustain electrode is made of a conductive metal.

Plasma display device according to another aspect of the present invention, a transparent front substrate; Three main electrode portions formed in a stripe shape parallel to each other on the surface of the front substrate and formed to have a width smaller than that of each positioned at both sides, and interconnecting the three main electrode portions. At least one pair of sustain electrodes having a plurality of connection electrode parts; A dielectric layer applied to a surface of the front substrate to embed the sustain electrodes; A protective film formed on the surface of the dielectric layer; A rear substrate sealed to the front substrate to form a discharge space; A plurality of first electrodes formed on a surface of the rear substrate at a predetermined angle with the sustain electrodes; A dielectric layer applied to a surface of the rear substrate such that the first electrodes are embedded; A plurality of partition walls formed on a surface of the dielectric layer between the first electrodes to partition a discharge space; And a phosphor layer in which red, green, and blue phosphor films are sequentially formed on at least one side surface of the discharge space partitioned by the partition walls.

In addition, a black mattress layer is formed between each pair of sustain electrodes.

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

3 illustrates a plasma display device according to an embodiment of the present invention.

Referring to FIG. 3, a plasma display device according to an exemplary embodiment of the present invention includes a front substrate 38 and a rear substrate 30 which is combined with the front substrate 38 to form a discharge space. The first electrode 31 having a predetermined pattern is formed on the rear substrate 30, and the dielectric layer 32 is coated so that the first electrodes 31 are embedded thereon. The pattern of the first electrodes 31 is preferably a stripe type, but is not limited thereto and may be variously made within the scope of the present invention. A partition layer 33 having a predetermined pattern is formed on the dielectric layer 32, and a phosphor layer 34 is coated on at least one side surface of each space partitioned by the partition walls 33. The pattern of the barrier ribs 33 may be a stripe type, but is not limited thereto, and may be variously made within the scope of the present invention, such as a waffle type. At least one pair of sustain electrodes 35 and 36 having a predetermined pattern is formed on the front substrate 38, and a black mattress layer 37 is formed between each pair of sustain electrodes 35 and 36. do. A dielectric layer 41 is formed on the sustain electrodes 35 and 36 and the black mattress layer 37, and a protective layer 42 is formed on the dielectric layer 41.

In more detail, the sustain electrodes 35 and 36 are formed by a printing method using a metal material, for example, silver (Ag) paste or a photolithography method using a photosensitive film. It may be, but is not limited thereto, and may be formed by various methods within the scope of the present invention, such as the Fodel method. In addition, the sustain electrodes 35 and 36 are three main electrode portions 35a, 35b, 35c, 36a, 36b, and 36c each having a linear type parallel to each other, and the main electrode portion 35a. It consists of a plurality of connection electrode portions 35d and 36d which connect between the (35b) 35c, 36a, 36b and 36c to form a plurality of openings 39. Here, the widths W2 of the main electrode portions 35b and 36b positioned at the center of the main electrode portions 35a, 35b, 35c, 36a, 36b, and 36c are respectively located at both sides. The main electrode portions 35a, 35c, 36a, and 36c are narrower than the widths W1 and W3, respectively. Preferably, the width W2 of the central main electrode portions 35b and 36b is equal to four times the width of the discharge gap 40 formed by the main electrode portions 35c and 36c facing each other. 10 or so. In addition, the connection electrode portions 35d and 36d are preferably located on a line coinciding with the partition walls 33, but are not necessarily limited thereto and may be variously made within the scope of the present invention.

In the plasma display device according to another embodiment of the present invention, the light emitting area of the main electrode parts 35a, 35b, 35c, 36a, 36b, and 36c is the weakest in the above-described embodiment. The width W1 of the main electrode parts 35a and 36a located at the outermost side of the phosphorus is wider than the width W2 and W3 of the remaining main electrode parts 35b, 35c, 36b and 36c, respectively. It is characterized by. Preferably, the width W1 of the outermost main electrode portions 35a and 36a is set to 8/10 to 9/10 of the width of the discharge gap 40, respectively.

In the plasma display device according to another embodiment of the present invention, in the first or second embodiment described above, one of the main electrode portions 35a, 35b, 35c, 36a, 36b, and 36c may be formed. The widths W3 of the main electrode portions 35c and 36c closest to the discharge gap 40 are each characterized by being equal to or greater than the minimum width which can ensure the start of stable discharge. Preferably, the widths W3 of the main electrode parts 35c and 36c closest to the discharge gap are each about 6/10 of the width of the discharge gap 40.

In the above embodiments, the sustain electrode is made of a conductive metal, and preferably, aluminum or silver (Ag) is used as the conductive metal, but is not necessarily limited thereto, and may be variously made within the scope of the present invention. .

The operation of the plasma display device according to the embodiment of the present invention having the structure as described above is as follows.

First, when a predetermined voltage is applied between the first electrode 31 and the sustain electrode 35, wall charges are charged on the surface of the dielectric layer 32 and the sustain electrodes 35 and 36 are in this state. AC voltage is applied between them to cause sustain discharge.

The sustain discharge between the sustain electrodes 35 and 36 will be described in more detail as follows. When an AC voltage of 180 V is applied between the sustain electrodes 35 and 36, the initial discharge is determined by the distance between the electrodes among the main electrode parts 35a, 35b, 35c, 36a, 36b, and 36c. It is started between the two closest main electrode portions 35c and 36c. At this time, in order to ensure the stable start of the initial discharge, as in the plasma display device according to the embodiment of the present invention, the main electrode portions 35c and 36c should each have a predetermined width or more. As described above, in the state in which charge is formed in the discharge space by the initial discharge, a discharging occurs due to an alternating voltage applied between the sustain electrodes 35 and 36, wherein the charge and ultraviolet rays formed during the initial discharge are the remaining main electrodes. Disruption of the discharge gas between the portions 35a, 35b, 36a, 36b is promoted to facilitate discharging.

The discharging generated by the AC voltage between the sustain electrodes 35 and 36 emits ultraviolet rays, and the emitted ultraviolet rays are formed on at least one side surface of the discharge space partitioned by the partition walls 33. The phosphor layer 34 is excited to emit white light, and the white light is filtered by a red, green, and blue color filter layer (not shown) formed under the front substrate 38, thereby realizing a desired color. Predetermined numbers, letters or graphics can be obtained.

According to the plasma display device of the present invention made as described above, the following effects can be obtained.

First, there is no need to form a bus electrode formed on a conventional sustain electrode, which greatly simplifies the manufacturing process and eliminates the possibility of short circuiting of the bus electrode in the forming process.

Second, by relatively widening the width of the outermost main electrode located in the region where the intensity of luminescence is weakest among the three main electrode parts of the sustaining electrode, it is possible to minimize the decrease in luminance due to the decrease of the aperture ratio and In this case, the possibility of a short circuit in the main electrode part forming the sustain electrode can be completely excluded.

Third, the width of the main electrode portion closest to the discharge gap among the three main electrode portions constituting the sustaining electrode is made wider than the minimum width necessary to secure the initiation of stable discharge, thereby ensuring the start of stable discharge. .

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

Claims (5)

Back substrate; A transparent front substrate sealed to the rear substrate to form a discharge space; And Three main electrode portions formed in a stripe shape parallel to each other in the discharge space formed by the rear substrate and the front substrate, and the width of the center is narrower than the width of the one located on both sides, and the three main electrodes And at least one pair of sustain electrodes having a plurality of connection electrode portions interconnecting the portions. The method of claim 1, Among the three main electrode portions constituting each of the sustain electrodes, the width of the main electrode portion furthest from the adjacent sustain electrodes forming the sustain electrode and the discharge cell is wider than the width of the remaining main electrode portions. Device. The method according to claim 1 or 2, And the sustain electrode is made of a conductive metal. Transparent front substrate; Three main electrode portions formed in a stripe shape parallel to each other on the surface of the front substrate and formed to have a width smaller than that of each positioned at both sides, and interconnecting the three main electrode portions. At least one pair of sustain electrodes having a plurality of connection electrode parts; A dielectric layer applied to a surface of the front substrate to embed the sustain electrodes; A protective film formed on the surface of the dielectric layer; A rear substrate sealed to the front substrate to form a discharge space; A plurality of first electrodes formed on a surface of the rear substrate at a predetermined angle with the sustain electrodes; A dielectric layer applied to a surface of the rear substrate such that the first electrodes are embedded; A plurality of partition walls formed on a surface of the dielectric layer between the first electrodes to partition a discharge space; And And a phosphor layer in which red, green, and blue phosphor films are sequentially formed on at least one side surface of the discharge space partitioned by the barrier ribs. The method of claim 4, wherein And a black mattress layer formed between the pair of sustain electrodes.