KR20050010135A - Plasma display panel - Google Patents

Abstract

PURPOSE: A plasma display panel is provided to improve discharge efficiency by optimizing a shape of a discharge cell according to a discharge gas diffusion and achieve discharge stability. CONSTITUTION: First and second substrates(10,20) are arranged to face each other. Address electrodes(21) are formed on the second substrate. A separation wall(25) is disposed between the first and second substrates and divides discharge cells(27R,27G,27B) and non-discharge region(26). Fluorescent materials are formed inside the respective discharge cells. Sustain electrodes(12,13) are formed on the first substrate. A dielectric layer(23) is formed at the whole surface of the second substrate to cover the address electrodes. The non-discharge region is disposed between the discharge cells adjacent to a direction of the address electrodes and connected to a direction of the sustain electrodes.

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 having a partition structure partitioned independently by each discharge cell unit by partition walls formed between both substrates.

In general, a plasma display panel (hereinafter referred to as a 'PDP') is a display device that realizes a predetermined image by exciting phosphors by ultraviolet rays generated by gas discharge. Is in the spotlight.

Referring to FIG. 5, in the conventional general PDP structure, an address electrode 101 is formed along one direction (the x-axis direction of the drawing) on the back substrate 100 and covers the address electrode 101 to cover the back substrate 100. The dielectric layer 103 is formed on the front surface. A stripe pattern partition wall 105 is formed on the dielectric layer 103 so as to be disposed between the address electrodes 101, and red (R), green (G), and blue (B) colors are formed between the partition walls 105. The phosphor layer 107 is formed.

In addition, one surface of the front substrate 110 facing the rear substrate 100 may be provided with a pair of transparent electrodes 112 and bus electrodes 113 along a direction crossing the address electrode 101 (y-axis direction of the drawing). The discharge sustain electrode 114 is formed, and the dielectric layer 116 and the MgO passivation layer 118 are formed on the entire front substrate 110 while covering the discharge sustain electrode 114.

The point where the address electrode 101 on the back substrate 100 and the discharge sustain electrode 114 on the front substrate 110 cross each other constitutes a discharge cell.

An address voltage Va is applied between the address electrode 101 and the discharge sustain electrode 114 to perform address discharge, and a sustain voltage Vs is applied between the pair of discharge sustain electrodes 114 to sustain discharge. The vacuum ultraviolet rays generated at this time excite the phosphor to emit visible light through the transparent front substrate 110 to implement the screen of the PDP.

However, in the PDP structure having the discharge sustaining electrode 114 and the stripe-shaped partition 105 of the type shown in FIG. 5, crosstalk occurs between the discharge cells adjacent to each other with the partition 105 therebetween. In addition, since discharge spaces are connected to each other along the direction in which the barrier ribs 105 are formed, there is a possibility that erroneous discharge occurs between neighboring discharge cells. In order to prevent this, the distance between the discharge sustaining electrodes 114 corresponding to adjacent pixels must be secured to a predetermined level or more, which hinders the improvement of efficiency.

In order to solve this problem, a PDP having an improved electrode and partition structure as shown in FIGS. 6 and 7 has been proposed.

That is, although the PDP structure shown in FIG. 5 has a stripe-shaped partition wall 121, the bus electrodes (ie, the pair of transparent electrodes 123a constituting the discharge sustaining electrode 123 face each other for each discharge cell). 123b) and a plasma display device disclosed in US Pat. No. 5,640,068.

However, even in the PDP having such a structure, the misdischarge in the direction parallel to the partition wall as described above could not be solved, and as shown in FIG. 8 for the purpose of solving the problem and increasing the phosphor coating area to increase the luminous efficiency. A PDP having a matrix-shaped partition wall 125 structure having orthogonal vertical partitions 125a and horizontal partitions 125b has been proposed. That is, in the stripe-type barrier rib structure, since only two surfaces of the phosphor are used in one discharge cell, the luminance is not high, and the luminance can be improved by adopting a closed barrier structure that can use four planes. As a related art, there is a PDP disclosed in Japanese Patent Laid-Open No. 10-149771.

However, such a matrix partition structure has a problem in that the efficiency of the vacuum exhaust during the panel manufacturing process is poor due to the characteristics of the structure.

The present invention has been made to solve the above problems, the object of which is to maximize the discharge efficiency by optimizing the structure of the partition partitioning the discharge cell, and to increase the conversion efficiency of the vacuum ultraviolet light generated during the discharge to the discharge and discharge It is to provide a plasma display panel that can ensure stability.

In addition, by providing an exhaust passage in the panel provides a plasma display panel that can improve the efficiency of the vacuum exhaust during the panel manufacturing process.

1 is a partially exploded perspective view illustrating a plasma display panel according to a first embodiment of the present invention.

2 is a partial plan view showing a plasma display panel according to a first embodiment of the present invention.

3 is a cross-sectional view taken along line A-A of FIG. 2.

4 is a partially exploded perspective view showing a plasma display panel according to a modification of the first embodiment of the present invention.

5 is a partial plan view of a plasma display panel according to a second embodiment of the present invention.

6 is a partially cut perspective view of a conventional plasma display panel.

7 is a partial plan view of a plasma display panel having a conventional stripe-type partition wall structure.

FIG. 8 is a partial plan view of a plasma display panel having a conventional matrix partition structure.

In order to achieve the above object, a plasma display panel according to the present invention comprises: a first substrate and a second substrate facing each other; Address electrodes formed on the second substrate; A partition wall disposed between the first substrate and the second substrate to partition the plurality of discharge cells and the non-discharge area; Phosphor layers formed in the respective discharge cells; And discharge sustain electrodes formed on the first substrate. The discharge cells adjacent in the address electrode direction are spaced apart from each other to form a non-discharge region.

The non-discharge regions disposed between the discharge cells adjacent in the address electrode direction are formed to communicate with each other in the discharge sustain electrode direction.

Each of the discharge cells is formed such that the widths of both ends located in the direction of the address electrode become narrower from the center of the discharge cells. This end portion may have a trapezoidal shape or may be formed to have an arc shape.

The depth measured from the upper end of the barrier ribs at both ends positioned in the address electrode direction of each of the discharge cells may become shallower as the distance from the center of the discharge cells increases.

The partition wall partitioning the discharge cell may be divided into a first partition member parallel to the address electrode direction and a second partition member crossing the address electrode direction, wherein the first partition member and the second partition member The height may be different from each other, and therefore, the height of the first partition member may be higher than the height of the second partition member, or the height of the first partition member may be lower than the height of the second partition member. .

The pair of discharge cells adjacent to the discharge sustain electrode direction are formed to share at least one partition wall.

On the other hand, in the plasma display panel of the present invention, the discharge sustain electrode is disposed outside the edge of the discharge space of the discharge cell in a direction crossing the address electrode direction so as to correspond to each of the discharge cells in pairs. And a bus electrode to be formed and a protruding electrode extending from the bus electrode to the inside of each of the discharge cells, the pair being opposed to each other.

In this case, the bus electrode is preferably formed to pass over the second partition member, the protruding electrode may be made of a transparent electrode.

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

1 is a partially exploded perspective view showing a plasma display panel according to a first embodiment of the present invention, Figure 2 is a partial plan view showing a plasma display panel according to a first embodiment of the present invention.

As shown, the plasma display panel (hereinafter referred to as PDP ') according to the first embodiment of the present invention basically has the first substrate 10 and the second substrate 20 disposed to face each other at a predetermined interval. In addition, a plurality of discharge cells 27R, 27G, and 27B are partitioned by partition walls in a space between the substrates 10 and 20 so as to cause plasma discharge. The first substrate 10 and the second substrate 20 Discharge sustaining electrodes 12 and 13 and address electrode 21 are disposed in each.

Specifically, first, a plurality of address electrodes 21 are formed along one direction (x-axis direction in the drawing) of the second substrate 20 on a surface facing the first substrate 10 of the second substrate 20. do. The address electrodes 21 are formed in a stripe shape and are formed in parallel with neighboring address electrodes 21 while maintaining a predetermined interval. A dielectric layer 23 is also formed on the second substrate 20 on which the address electrode 21 is formed. The dielectric layer 23 may be formed on the entire surface of the substrate while covering the address electrode 21. In the present embodiment, the stripe address electrode 21 is taken as an example, but the scope of the present invention is not limited thereto, and the shape of the address electrode to be applied may be variously changed.

A partition wall 25 is disposed in the space between the first substrate 10 and the second substrate 20 to partition the plurality of discharge cells 27R, 27G, 27B and the non-discharge region 26. The partition wall 25 is preferably formed on the upper surface of the dielectric 23 formed on the second substrate 20. Here, the discharge cells 27R, 27G, and 27B contain a discharge gas therein, and the discharge cells 27R, 27G, and 27B are spaces intended to cause gas discharge therein while an address voltage or a discharge sustain voltage is applied, and the non-discharge area 26 has a separate voltage therein. Is not applied, and is thus an area or space where discharge or light emission is not intended.

The non-discharge regions 26 are formed while the discharge cells adjacent to each other in the direction of the address electrode 21 are disposed apart from each other with a space therebetween, and the non-discharge regions 26 are disposed in the direction of the discharge sustain electrodes 12 and 13. It is formed to communicate with each other. At this time, a pair of discharge cells adjacent to the discharge sustain electrodes 12 and 13 are formed while sharing at least one partition wall.

On the other hand, the partition wall partitioning the discharge cells 27R, 27G, 27B is the first partition wall member 25a parallel to the address electrode 21 direction and the second partition wall member 25b crossing the address electrode 21 direction. In this case, the discharge cells 27R, 27G, and 27B neighboring the discharge sustaining electrodes 12 and 13 may share the first partition member 25a. In addition, the discharge cells 27R, 27G, and 27B adjacent to the address electrode 21 are disposed to face each other with the second partition wall members 25b spaced therebetween. 26).

The non-discharge area 26 formed as described above can smoothly evacuate the panel during the manufacturing process, thereby shortening the exhaust index and improving color characteristics. In addition, local heat concentration can be improved by dissipating heat generated in the PDP due to the discharge in the discharge cells 27R, 27G, and 27B in the non-discharge region 26.

The discharge cells 27R, 27G, and 27B have a width (discharge sustaining electrode direction, i.e., y-axis direction in the drawing) of both ends positioned in the address electrode 21 direction (x-axis direction in the drawing). 27R, 27G, and 27B are formed to be narrower away from the center. That is, referring to FIG. 1, the width Wc at the center of the discharge cells 27R, 27G, 27B is larger than the width We at the ends, and the width We at the ends is discharged. The further away from the center of the cells 27R, 27G, 27B, the narrower it becomes. In this embodiment, both ends of the discharge cells 27R, 27G, and 27B located in the direction of the address electrode 21 have a trapezoidal shape, and thus the overall planar shape of each discharge cell 27R, 27G, 27B is octagonal. Is achieved.

The discharge sustaining electrodes 12 and 13 formed on the first substrate 10 are formed in each of the discharge cells 27R, 27G, and 27B along the direction crossing the address electrode 21 (the y-axis direction in the drawing). Bus electrodes 12b and 13b arranged in pairs to correspond to each other and protruding electrodes extending from the bus electrodes 12b and 13b into the respective discharge cells 27R, 27G, and 27B, respectively, so that the pairs face each other. And 12a and 13a. The bus electrodes 12b and 13b are disposed outside the edges of the discharge space of each of the discharge cells 27R, 27G, and 27B, and may be formed to pass over the second partition wall member 25b. By doing so, the bus electrodes 12b and 13b do not pass over the discharge cells 27R, 27G, and 27B, thereby improving luminance reduction due to the bus electrodes 12b and 13b which are usually made of metal electrodes. The protruding electrodes 12a and 13a are preferably made of transparent electrodes, but are not necessarily limited thereto, and may be made of opaque electrodes such as metal electrodes.

3 is a cross-sectional view taken along line A-A of FIG. 2.

Referring to FIG. 3, in the discharge cell 27R of the PDP according to the present embodiment, a depth measured from an upper end of the partition wall 25 at both ends positioned in the direction of the address electrode 21 is measured in the discharge cell 27R. The further away from the center, the shallower it is formed. That is, the depth de at the end of the discharge cell 27R is shallower than the depth dc at the center, and the farther the depth de at this end is from the center of the discharge cell 27R. It gradually becomes shallow.

The phosphor layer formed in the discharge cell 27R at the end of the discharge cell 27R having a relatively weak intensity of gas discharge by forming the depth of the discharge cell 27R differently at the center and at both ends as described above. The distance between the 29R and the discharge sustaining electrodes 12 and 13 can be narrowed, and consequently the phosphor layer can be disposed at a closer distance from the discharge sustaining electrode to convert the vacuum ultraviolet rays into visible light generated during discharge. The efficiency can be improved. The same applies to the discharge cells 27G and 27B of different colors.

4 is a partially exploded perspective view showing a plasma display panel according to a modification of the first embodiment of the present invention.

As shown, the first partition member 25a and the second partition member 25b forming the discharge cells 27R, 27G, and 27B may be formed to have different heights. The height h1 of the member 25a is formed higher than the height h2 of the second partition wall member 25b. In this way, an exhaust space is formed between the first substrate 10 and the second substrate 20 to smoothly evacuate the panel during the panel manufacturing process. Although not shown, the height of the first partition member may be formed lower than the height of the second partition member.

5 is a partial plan view of a plasma display panel according to a second embodiment of the present invention. The PDP according to the present embodiment has the same basic structure as that of the PDP according to the first embodiment, and improves the discharge efficiency by changing the structure of the partition wall formed on the second substrate 20. In each embodiment, the same components use the same reference numerals.

Referring to FIG. 5, in the PDP according to the present exemplary embodiment, the plurality of discharge cells 37R, 37G, and 37B and the non-discharge area 36 are partitioned by the partition wall 35. The non-discharge regions 36 are formed while the discharge cells neighboring each other in the direction of the address electrode 21 (the x-axis direction in the drawing) are disposed to be spaced apart from each other, and the non-discharge regions 36 are the discharge sustain electrodes. It is formed to communicate with each other in the (12, 13) direction. At this time, a pair of discharge cells adjacent to the discharge sustain electrodes 12 and 13 are formed while sharing at least one partition wall.

On the other hand, the partition wall partitioning the discharge cells 37R, 37G, 37B is the first partition wall member 35a parallel to the address electrode 21 direction and the second partition wall member 35b crossing the address electrode 21 direction. In this case, the discharge cells 37R, 37G, and 37B neighboring the discharge sustaining electrodes 12 and 13 may share the first partition member 35a. In addition, the discharge cells 37R, 37G, and 37B adjacent to the address electrode 21 are disposed to face each other with the second partition wall members 35b spaced therebetween. 36).

The discharge cells 37R, 37G, and 37B have a width (discharge sustaining electrode direction, i.e., y-axis direction in the drawing) at both ends positioned in the address electrode 21 direction (x-axis direction in the drawing). 37R, 37G, 37B) formed farther away from the center is formed. In the present embodiment, both ends of the discharge cells 37R, 37G, and 37B, which are located in the direction of the address electrode 21, have an arc shape.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

As described above, according to the plasma display panel according to the present invention, it is possible to smoothly evacuate during the panel manufacturing process by securing a non-discharge region in the form of a space extending in the discharge sustaining electrode direction between discharge cells neighboring in the address electrode direction. Therefore, there is an effect that can shorten the exhaust index and improve the color characteristics.

In addition, it is possible to improve the discharge efficiency by optimizing the shape of the discharge cell in consideration of the discharge gas diffusion form, and by disposing the non-discharge area adjacent to the discharge cell, it is possible to effectively dissipate heat generated during discharge in the discharge space inside the discharge cell. have.

Claims (13)

A first substrate and a second substrate disposed to face each other; Address electrodes formed on the second substrate; A partition wall disposed between the first substrate and the second substrate to partition the plurality of discharge cells and the non-discharge area; Phosphor layers formed in the respective discharge cells; And Discharge sustaining electrodes formed on the first substrate; Including, And discharge cells adjacent to each other in the address electrode direction with a space therebetween to form a non-discharge region. The method of claim 1, And a non-discharge area disposed between discharge cells adjacent in the address electrode direction so as to communicate with each other in the discharge sustain electrode direction. The method of claim 1, And wherein each of the discharge cells becomes narrower as the widths of both ends positioned in the direction of the address electrode move away from the center of the discharge cells. The method of claim 3, wherein And both ends of the discharge cell in the direction of the address electrode have a trapezoidal shape. The method of claim 3, wherein And both end portions of the discharge cell in the direction of the address electrode have an arc shape. The method of claim 3, wherein And a depth measured from an upper end of the barrier ribs at both ends positioned in the address electrode direction of each of the discharge cells becomes shallower from the center of the discharge cell. The method of claim 1, The partition wall partitioning the discharge cell may include a first partition member parallel to the address electrode direction and a second partition wall member crossing the address electrode direction. And a height different from each other in the first barrier member and the second barrier member. The method of claim 7, wherein And a height of the first barrier member is higher than a height of the second barrier member. The method of claim 7, wherein And a height of the first barrier member is lower than a height of the second barrier member. The method of claim 1, And a pair of discharge cells adjacent in the discharge sustaining electrode direction to share at least one partition wall. A first substrate and a second substrate disposed to face each other; Address electrodes formed on the second substrate; A partition wall disposed between the first substrate and the second substrate to partition the plurality of discharge cells and the non-discharge area; Phosphor layers formed in the respective discharge cells; And Discharge sustaining electrodes formed on the first substrate; Including, The partition wall partitioning the discharge cell is formed of a first partition wall member parallel to the address electrode direction and a second partition wall member crossing the address electrode direction. Neighboring discharge cells in the address electrode direction are spaced apart from each other to form a non-discharge region, The discharge sustain electrode is disposed outside the edge of the discharge space of the discharge cell in a direction crossing the address electrode direction and paired with each pair of discharge cells so as to correspond to each of the discharge electrodes. And a protruding electrode which extends into each of the discharge cells and is formed to face each other. The method of claim 11, And the bus electrode is formed to pass over an upper portion of the second partition member. The method of claim 11, And the protruding electrode comprises a transparent electrode.