KR100499084B1 - Plasma display panel and method of fabricating the same - Google Patents

Abstract

The present invention relates to a plasma display panel and a method of manufacturing the same that can improve address discharge efficiency.

Plasma display panel of the present invention is formed between the upper substrate and the lower substrate partition wall for providing a discharge space in the unit of discharge cells; An auxiliary discharge channel formed between the partition walls; It characterized in that it comprises a dielectric layer having a relatively smaller thickness in the auxiliary discharge channel than the discharge space.

Description

Plasma display panel and manufacturing method thereof {PLASMA DISPLAY PANEL AND METHOD OF FABRICATING THE SAME}

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 that can improve address discharge efficiency.

Recently, various flat panel displays have been developed to reduce weight and volume, which are disadvantages of cathode ray tubes. Such flat panel displays include liquid crystal displays (LCDs), field emission displays (FEDs), plasma display panels (hereinafter referred to as "PDPs"), and electroluminescence (Electro). -Luminescence (EL) display.

PDP is a display device using a gas discharge has the advantage that it is easy to manufacture a large panel. As a PDP, a three-electrode AC surface discharge type PDP having three electrodes and driven by an alternating voltage is typical.

The discharge cells of the PDP shown in FIG. 1 are a pair of sustain electrodes formed on the upper substrate 10, that is, a scan / hold electrode 12Y and a common sustain electrode 12Z, and an address formed on the lower substrate 18. FIG. An electrode 12X is provided. In FIG. 1, the lower substrate 18 is shown rotated 90 °.

The sustain electrode pairs 12Y and 12Z consist of a transparent electrode 12a and a bus electrode 12b, and intersect with the address electrode 12X.

The transparent electrode 12a is formed of a transparent conductive material in order to transmit light supplied from the discharge cell. The bus electrode 12b compensates for the conductivity of the transparent electrode 12a having low conductivity due to its relatively high resistance.

The upper dielectric layer 14 and the passivation layer 16 are formed on the upper substrate 10 on which the sustain electrode pairs 12Y and 12Z are formed. The upper dielectric layer 14 accumulates wall charges generated during plasma discharge. The passivation layer 16 prevents damage to the upper dielectric layer 14 due to sputtering generated during plasma discharge and increases emission efficiency of secondary electrons. As the protective film 16, magnesium oxide (MgO) is usually used.

The lower dielectric layer 22 for wall charge accumulation is formed on the lower substrate 18 on which the address electrode 12X is formed. The partition wall 24 is formed on the lower dielectric layer 22, and the phosphor 20 is coated on the surfaces of the lower dielectric layer 22 and the partition wall 24. The partition wall 24 prevents ultraviolet rays and visible rays generated by the discharge from leaking into adjacent discharge cells. The phosphor 20 is excited by ultraviolet rays generated during gas discharge to generate visible light of any one of red, green, and blue. Inert gas for gas discharge is injected into the discharge space provided between the upper and lower substrates 10 and 18 and the partition wall 24.

The discharge cell of this structure is selected by the counter discharge between the address electrode 12X and the scan / hold electrode 12Y, and then sustains the discharge by the surface discharge between the sustain electrode pairs 12Y and 12Z. In such a discharge cell, the fluorescent substance 20 emits light by ultraviolet rays generated during sustain discharge, so that visible light is emitted to the outside of the cell. As a result, the discharge cells adjust the period during which the discharge is maintained to implement gray scale, and the PDP in which the discharge cells are arranged in a matrix form displays an image.

The partition wall 24 of the PDP is divided into a stripe shown in FIG. 2 and a lattice type shown in FIG. 3. Here, in the case of the stripe partition wall, the exhaust gas is easily exhausted, but the coating area of the phosphor 20 is small. In the case of the lattice-shaped partition wall, the coating area of the phosphor 20 may be increased to increase luminance, but the exhaust gas may not be well exhausted.

In order to solve this problem, a grid-shaped partition wall having an auxiliary discharge channel is proposed as shown in FIG.

In the PDP shown in FIG. 4, an auxiliary discharge channel 15 is formed between the horizontal partitions among the grid partitions 24 for distinguishing adjacent discharge cells. The impurity gas remaining in the panel is discharged by the auxiliary discharge channel 15 before the inert gas necessary for discharge is discharged, and the phosphor coating area is widened by the lattice-shaped partition wall 24 to improve luminance.

In addition, the auxiliary discharge channel 15 is formed to be wide so that the scan / sustain electrode 12Y and the common sustain electrode 12Z of adjacent discharge cells are shared. Accordingly, priming particles are generated by the voltage difference between the scan / hold electrode 12Y and the common sustain electrode 12Z in the auxiliary discharge channel 15 during address discharge, and are supplied to the adjacent discharge cells to be selected next. In the discharge cells supplied with the priming particles, wall charges are sufficiently formed by the priming effect, thereby helping address discharge.

However, the conventional PDP has a problem in that priming discharge is difficult to occur because the auxiliary discharge channel space is small and the electrode area is small.

 Accordingly, an object of the present invention is to provide a plasma display panel and a method of manufacturing the same that can improve address discharge efficiency.

In order to achieve the above object, a PDP according to an embodiment of the present invention is formed between the upper substrate and the lower substrate partition wall for providing a discharge space in the unit of discharge cells; An auxiliary discharge channel formed between the partition walls; It characterized in that it comprises a dielectric layer having a relatively smaller thickness in the auxiliary discharge channel than the discharge space.

The dielectric layer is characterized in that the dielectric layer of the auxiliary discharge channel has a thickness smaller than the dielectric layer of the discharge space.

And first and second electrodes formed between the dielectric layer and the second substrate.

The first and second electrodes extend in the kitchen space and are formed in the auxiliary discharge channel region.

The distance between the first and second electrodes in the auxiliary discharge channel is relatively narrower than the distance between the first and second electrodes in the discharge space.

The distance between the first and second electrodes in the auxiliary discharge channel is characterized in that formed 10 ~ 50㎛ narrower than the distance between the first and second electrodes in the discharge space.

The partition wall may include first partition walls parallel to the first and second electrodes; And second partitions orthogonal to the first partitions between the first partitions.

According to an aspect of the present invention, there is provided a method of manufacturing a PDP, including: preparing a partition wall for preparing a kitchen space and a first substrate having an auxiliary discharge channel formed between the partition walls; Providing a second substrate having a dielectric layer having a different thickness from the auxiliary discharge channel and the discharge space; And bonding the first substrate and the second substrate to each other.

The dielectric layer of the auxiliary discharge channel is formed to have a thickness smaller than the dielectric layer of the electrical discharge space.

And forming first and second electrodes between the dielectric layer and the second substrate.

The first and second electrodes extend in the kitchen space and are formed in the auxiliary discharge channel region.

The distance between the first and second electrodes in the auxiliary discharge channel may be formed to be relatively narrower than the distance between the first and second electrodes in the discharge space.

The distance between the first and second electrodes in the auxiliary discharge channel is characterized in that formed 10 ~ 50㎛ narrower than the distance between the first and second electrodes in the discharge space.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 5 to 8.

FIG. 5 is a view showing a discharge cell structure of a PDP according to a first embodiment of the present invention, and FIG. 6 is a plan view showing a lattice-shaped partition wall having an auxiliary discharge channel of the PDP shown in FIG.

The discharge cells of the PDP shown in FIG. 5 include a pair of sustain electrodes formed on the upper substrate 110, that is, the scan / hold electrode 112Y and the common sustain electrode 112Z, and an address formed on the lower substrate 118. An electrode 112X.

The sustain electrode pairs 112Y and 112Z are formed of the transparent electrode 112a and the bus electrode 112b and intersect with the address electrode 112X.

The transparent electrode 112a is formed of a transparent conductive material to transmit light supplied from the discharge cell. The bus electrode 112b compensates for the conductivity of the transparent electrode 112a having low conductivity due to its relatively high resistance.

The distance d1 between opposing transparent electrodes 112a in each discharge cell in the discharge cells is formed to be narrower than the distance d2 between transparent electrodes 112a in the space of the auxiliary discharge channel 115 adjacent between the discharge cells. . Thus, priming particles are easily formed even at a relatively low voltage by making the distance d2 between the transparent electrodes 112a in the auxiliary discharge channel 115 space narrower than the distance d1 between the transparent electrodes 112a in the kitchen space. Can be formed. For example, the distance d1 between the transparent electrodes 112a in the discharging space is about 10 to 50 μm smaller than the distance d2 between the transparent electrodes 112a in the space of the auxiliary discharge channel 115.

First and second upper dielectric layers 113 and 114 and a passivation layer 116 are formed on the upper substrate 110 on which the sustain electrode pairs 112Y and 112Z are formed. The first upper dielectric layer 113 is formed on the upper substrate 110 on which the sustain electrode pairs 112Y and 112Z are formed, and the second upper dielectric layer 114 is formed except for the region overlapping the auxiliary discharge channel 115. 1 is formed on the upper dielectric layer 113. Here, the total thickness of the first and second upper dielectric layers 113 and 114 is about 20 to 40 μm, and the thickness difference between the first and second upper dielectric layers 113 and 114 is about 5 to 10 μm.

The wall charges generated during the plasma discharge are accumulated in the first and second upper dielectric layers 113 and 114. The passivation layer 116 prevents damage to the first and second upper dielectric layers 113 and 114 by sputtering generated during plasma discharge, and increases emission efficiency of secondary electrons. As the protective film 116, magnesium oxide (MgO) is usually used.

The lower dielectric layer 122 for wall charge accumulation is formed on the lower substrate 118 on which the address electrode 112X is formed. The lattice-shaped partition wall 124 overlapping the bus electrode 112b is formed on the lower dielectric layer 122, and the phosphor 120 is coated on the surfaces of the lower dielectric layer 122 and the partition wall 124.

The grid-shaped partition wall 124 prevents ultraviolet rays and visible light generated by the discharge from leaking into adjacent discharge cells. The grid-shaped partition wall 124 includes a horizontal partition wall 124a parallel to the sustain electrode pairs 112Y and 112Z, and a vertical partition wall 124b crossing the sustain electrode pairs 112Y and 112Z. The horizontal partition wall 124a of the grid-shaped partition wall 124 separates discharge cells vertically adjacent to each other with the auxiliary discharge channel 115 interposed therebetween, and the vertical partition wall 124b distinguishes discharge cells adjacent to the left and right.

The auxiliary discharge channel 115 is a passage for discharging the impurity gas and the like remaining in the panel before injecting the inert gas required during discharge. Priming particles are generated in the auxiliary discharge channel 115 by the voltage difference between the scan / hold electrode 112Y and the common sustain electrode 112Z of the adjacent discharge cells during the address discharge. The priming particles are supplied to the adjacent discharge cells to improve the address discharge efficiency of the adjacent discharge cells.

The phosphor 120 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue. Inert gas for gas discharge is injected into the discharge space provided between the upper and lower substrates 110 and 118 and the partition wall 124.

The discharge cell of this structure is selected by the counter discharge between the address electrode 112X and the scan / sustain electrode 112Y, and then sustains the discharge by the surface discharge between the sustain electrode pairs 112Y and 112Z. In such a discharge cell, the fluorescent substance 120 emits light by ultraviolet rays generated during sustain discharge, so that visible light is emitted to the outside of the cell. As a result, the discharge cells adjust the period during which the discharge is maintained to implement gray scale, and the PDP in which the discharge cells are arranged in a matrix form displays an image.

As described above, in the PDP according to the first embodiment of the present invention, the upper dielectric layer overlapping the auxiliary discharge channel is formed thinner than the kitchen discharge space to form a wider discharge space of the auxiliary discharge channel, and the distance between the transparent electrodes in the auxiliary discharge channel is reduced. The formation rate of the priming particles can be increased by forming a narrower than the distance between the transparent electrodes of the entire space. On the other hand, since the thickness of the dielectric layer in the auxiliary discharge channel and the dielectric layer in the discharge space of the present invention is different, cross talk between adjacent cells by using the differential dielectric layer does not occur.

On the other hand, the dielectric layer of the upper substrate according to the first embodiment of the present invention can be formed to have a relatively low groove in the auxiliary discharge channel than the discharge space.

7 is a view showing a discharge cell structure of a plasma display panel according to a second embodiment of the present invention.

Referring to FIG. 7, in the plasma display panel according to the second embodiment of the present invention, a region in which the second upper dielectric layer 214 overlaps the auxiliary discharge channel 215 and a part of the partition wall in comparison with the PDP shown in FIG. 5. Except for being formed in the region except for having the same components, detailed description of the same components as in FIG. 5 will be omitted.

The first upper dielectric layer 213 is formed on the upper substrate 210 on which the sustain electrode pairs 212Y and 212Z are formed, and the second upper dielectric layer 214 is a part of the lattice-shaped partition wall 224 and the auxiliary discharge channel ( It is formed on the first upper dielectric layer 213 except for the region overlapping the 215. As such, since only the first upper dielectric layer 213 is formed in all or a portion of the lattice-shaped partition wall 224 and overlapping the auxiliary discharge channel 215, the space of the auxiliary discharge channel 215 is wider than that of the first embodiment. You lose. In addition, the second upper dielectric layer 214 overlaps a portion of the lattice-shaped partition wall 224 so that the priming particles are easily transferred to the next discharge cell. As such, the space of the auxiliary discharge channel 215 is increased, thereby increasing the production rate of the priming particles.

The distance d1 between the transparent electrodes 212a in the discharging space is smaller than the distance d2 between the transparent electrodes 212a in the space of the auxiliary discharge channel 215 adjacent to the discharge cells. As described above, the priming particles are easily formed even at a relatively low voltage by forming a smaller distance d2 between the transparent electrodes 212a in the space of the auxiliary discharge channel 215 than the distance d1 between the transparent electrodes 212a in the kitchen space. Can be formed. For example, the distance d1 between the transparent electrodes 212a in the kitchen space is formed to be about 10 to 50 μm smaller than the distance d2 between the transparent electrodes 212a in the space of the auxiliary discharge channel 215.

8A to 8E are views illustrating a method of manufacturing the upper substrate of the PDP according to the first and second embodiments of the present invention.

First, a transparent conductive material is deposited on the upper substrate 210 and then patterned to form a transparent electrode 212a as shown in FIG. 8A. As the bus electrode material is deposited on the upper substrate 210 on which the transparent electrode 212a is formed and patterned, the bus electrode 212b is formed as shown in FIG. 8B. The first upper dielectric layer 213 is formed on the upper substrate 210 on which the bus electrode 212b is formed as shown in FIG. 8C by screen printing. The second upper dielectric layer 214 is formed on the upper substrate 210 on which the first upper dielectric layer 213 is formed, as shown in FIG. 8D.

In this case, the second upper dielectric layer 214 is formed in a region other than the region overlapping with the auxiliary discharge channel 115 as shown in FIG. 5 or as a whole or part of the partition wall 224 and the auxiliary discharge channel 215 as shown in FIG. 7. It is formed in the area except the overlapping area.

 Thereafter, magnesium oxide, which is a protective layer material, is coated on the first and second dielectric layers 213 and 214 to form a protective film 216 as shown in FIG. 8E.

As described above, the PDP and the method of manufacturing the same according to the present invention form the upper dielectric layer overlapping with the auxiliary discharge channel thinner than the kitchen space to form a wide auxiliary discharge channel space and the distance between the electrodes of the auxiliary discharge channel in the kitchen space The formation rate of the priming particles is increased by forming a narrower than the distance between the electrodes to strengthen the electric field strength. These priming particles can be easily transferred to the next cell to improve the efficiency of the address discharge.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

1 is a cross-sectional view showing a conventional three-electrode alternating current type conventional plasma display panel.

2 is a view showing a stripe-type partition wall of a conventional plasma display panel.

3 is a view showing a lattice partition of a conventional plasma display panel.

4 is a cross-sectional view illustrating a plasma display panel having an auxiliary discharge channel.

5 is a cross-sectional view illustrating a discharge cell structure of a plasma display panel according to a first embodiment of the present invention.

FIG. 6 is a plan view showing a grid-shaped partition wall having an auxiliary discharge channel of the plasma display panel shown in FIG.

7 is a cross-sectional view illustrating a discharge cell structure of a plasma display panel according to a second embodiment of the present invention.

8A to 8E are cross-sectional views illustrating a manufacturing process of an upper substrate of a plasma display panel according to the first and second embodiments of the present invention.

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

10,100: upper substrate 12X, 112X, 212X: address electrode

12Y, 112Y: scan sustain electrode 12Z, 12Z: common sustain electrode

14,22: dielectric layers 15, 115, 215: auxiliary discharge channel

16, 116: protective film 18: lower substrate

20,120,220: Phosphor 24,124,224: Bulkhead

Claims (13)

A partition wall formed between the upper substrate and the lower substrate to provide a kitchen space in discharge cell units; An auxiliary discharge channel formed between the partition walls; And a dielectric layer having a relatively smaller thickness in the auxiliary discharge channel than the discharge space. delete The method of claim 1, And first and second electrodes formed between the dielectric layer and the second substrate. The method of claim 3, wherein And the first and second electrodes extend widely in the kitchen space and are formed in the auxiliary discharge channel region. The method of claim 4, wherein And a distance between the first and second electrodes in the auxiliary discharge channel is relatively smaller than a distance between the first and second electrodes in the discharge space. The method of claim 5, And a distance between the first and second electrodes in the auxiliary discharge channel is 10 to 50 μm narrower than the distance between the first and second electrodes in the discharge space. The method of claim 3, wherein The partition wall First barrier ribs parallel to the first and second electrodes; And second partitions orthogonal to the first partitions between the first partitions. Providing a first substrate having a partition for providing a discharge space and an auxiliary discharge channel formed between the partitions; Providing a second substrate having a dielectric layer having a relatively smaller thickness in the auxiliary discharge channel than the discharge space; And bonding the first substrate and the second substrate to each other. delete The method of claim 8, And forming first and second electrodes between the dielectric layer and the second substrate. The method of claim 10, And the first and second electrodes extend widely in the kitchen space and are formed in the auxiliary discharge channel region. The method of claim 11, And a distance between the first and second electrodes in the auxiliary discharge channel is smaller than the distance between the first and second electrodes in the discharge space. The method of claim 12, The distance between the first and second electrodes in the auxiliary discharge channel is 10 to 50㎛ narrower than the distance between the first and second electrodes in the electrical discharge space manufacturing method of the plasma display panel.