KR100502915B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel having a partition structure in which each discharge cell is independently partitioned by partition walls disposed between both substrates. The panel of the present invention comprises: first and second substrates facing each other; Discharge sustain electrodes and address electrodes provided on the first and second substrates, respectively; Barrier ribs disposed in a space between the first and second substrates to form discharge cells and non-discharge regions; A phosphor layer formed in each of the discharge cells, wherein the discharge sustaining electrode includes a pair of protruding electrodes disposed opposite to each of the discharge cells, and a pair of bus electrodes electrically connected to the protruding electrodes, respectively. The partition wall includes a discharge suppression partition member for suppressing generation of a discharge between bus electrodes of neighboring discharge cells in a length direction of the address electrode.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having a partition structure in which each discharge cell is independently partitioned by partition walls disposed between both substrates.

Plasma Display Panel (hereinafter referred to as 'PDP') is a display device that excites a phosphor by ultraviolet rays generated by gas discharge and realizes a predetermined image. It is attracting attention.

Such a PDP can be 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. PDPs having a surface discharge structure are frequently used.

Thus, when the general structure of the PDP of the AC surface discharge structure is described, the PDP of the AC surface discharge structure includes a pair of first and second substrates disposed to face each other.

Address electrodes, a dielectric layer, and a partition wall are sequentially provided on an inner surface of the second substrate, and the address electrodes and the partition wall have a stripe pattern formed in the same direction.

In addition, discharge sustaining electrodes, a dielectric layer, and an MgO passivation layer are sequentially provided on an inner surface of the first substrate facing the second substrate, wherein the discharge sustaining electrode includes a pair of transparent electrodes arranged to be orthogonal to the address electrodes; And metal bus electrodes provided to the transparent electrodes, respectively, wherein the discharge sustain electrodes are formed in a stripe pattern.

Accordingly, when a driving voltage is applied to the address electrode and the discharge sustaining electrode, the discharge gas filled in the discharge space between the two substrates is discharged, and the vacuum ultraviolet rays generated by the discharge excite the corresponding phosphors to display visible light through the transparent first substrate. While emitting the PDP screen.

However, in the conventional surface discharge type PDP, since the partition walls are formed in a stripe pattern as described above, discharge spaces are connected to each other along the direction in which the partition walls are formed, and thus, misdischarge between neighboring discharge cells is caused. There is a possibility. Therefore, in order to prevent the above mis-discharge, the distance between the discharge sustain electrodes corresponding to the adjacent pixels must be secured to a predetermined level or more. This countermeasure prevents the improvement of the efficiency.

In order to solve this problem, Japanese Patent Laid-Open No. 10-149771 discloses a PDP having a partition structure of a matrix structure. Here, the matrix structure refers to a structure in which the partition walls are formed in the horizontal direction and the vertical direction, respectively, so that the discharge cells are independently partitioned by the respective horizontal partition walls and the vertical partition walls.

However, in the PDP having the partition walls of the matrix structure, the discharge cells share the horizontal partition walls and the vertical partition walls with the neighboring cells, respectively, so that bus electrodes provided to the transparent electrodes are disposed inside the discharge cells. Therefore, in the part blocked by the bus electrode, there is a problem in that the luminance is drastically lowered so that the overall luminance is lowered and the luminous efficiency is lowered.

In order to solve the above problems, each discharge cell is separately formed, a non-discharge region is formed between the discharge cells along the longitudinal direction of the address electrode, and a PDP in which a bus electrode is disposed in the non-discharge region is disclosed. It is. In the PDP having such a structure, since the bus electrode is disposed in the non-discharge region, it is possible to solve the problem of lowering of the aperture ratio due to the bus electrode and thus lowering of luminance.

However, in the PDP having such a structure, since the discharge gas is filled in the non-discharge region and the discharge sustain pulse is continuously applied to the bus electrodes, unnecessary discharge is generated in the non-discharge region. The driving power is increased, there is a problem that the color purity is lowered.

Accordingly, an object of the present invention is to provide a plasma display panel capable of removing unnecessary discharges between bus electrodes.

The present invention to achieve the above object,

First and second substrates disposed to face each other;

Discharge sustain electrodes and address electrodes provided on the first and second substrates, respectively;

Barrier ribs disposed in a space between the first and second substrates to form discharge cells and non-discharge regions;

A phosphor layer formed in each discharge cell;

Including,

The discharge sustaining electrode includes a pair of protruding electrodes disposed to face the inside of each discharge cell, and a pair of bus electrodes electrically connected to the protruding electrodes, respectively, and the partition wall discharge cells adjacent in the longitudinal direction of the address electrode. The present invention provides a plasma display panel having a discharge preventing partition member for suppressing generation of discharge between bus electrodes.

According to a preferred embodiment of the present invention, the partition wall, the first partition member for partitioning the discharge cells in a direction parallel to the bus electrode, and the second partition wall for partitioning the discharge cells in a direction parallel to the address electrode It may comprise a member.

And, based on the center of each non-discharge area, each of the discharge cells can be arranged one by one in each of the first to fourth quadrants of the coordinates formed by the horizontal axis and the vertical axis passing through the center. The width of both ends positioned along the length direction of the electrode may be smaller than the center of the discharge region. For example, the shape of both ends of the discharge cell may have any one of a trapezoidal shape, a wedge shape or an arc shape. In addition, the first and second partition wall members may be formed at different heights.

 In the plasma display panel according to another aspect of the present invention, a portion corresponding to a rear end portion of the protruding electrode that extends from the bus electrode into the discharge region, respectively, that is to correspond to both end portions of the discharge region, is the same as the discharge region. To similar planar shapes.

On the other hand, the embodiment of the present invention is not limited to the barrier rib structure described above, for example, the discharge cells of the rectangular or octagonal planar shape in a line orthogonal to the address electrode, and the non-discharge between the rows of the discharge cells Obviously, the present invention can also be applied to a PDP having an area.

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

1 is an exploded perspective view of an essential part of a plasma display panel according to a first embodiment of the present invention, and FIG. 2 is a plan view illustrating an assembled state of FIG. 1.

Referring to the drawings, the plasma display panel (hereinafter referred to as 'PDP') according to the present exemplary embodiment includes a first substrate 10 and a second substrate 20 disposed to face each other at a predetermined interval.

On the inner surface of the second substrate 20, a plurality of address electrodes 21 are formed along one direction (the Y-axis direction of the drawing). The address electrodes 21 are formed in a stripe pattern and are formed to be parallel to each other while maintaining a predetermined distance from the neighboring electrodes 21. A dielectric layer 23 is also formed on the second substrate 20 on which the address electrode 21 is formed. The dielectric layer 23 is formed on the entire surface of the substrate 20 while covering the address electrodes 21. Although the address electrode 21 of the stripe pattern is exemplified in the present embodiment, 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 provided on the dielectric layer 23 of the second substrate 20 to partition the plurality of discharge cells 27R, 27G, and 27B and the non-discharge regions 26. Here, the discharge cells 27R, 27G, and 27B are spaces where gas discharge and light emission are intended to occur, and the non-discharge regions 26 refer to spaces where discharge and light emission are not intended. 1 and 2 illustrate embodiments in which discharge cells 27R, 27G, and 27B and non-discharge regions 26 are formed to have independent cell structures, respectively.

The partition walls 25 of the present embodiment forming the discharge cells 27R, 27G, 27B and the non-discharge regions 26 are formed in a direction parallel to the address electrode 21, so that the discharge cells 27R, 27G are formed. The first partition member 25a divides the plurality of 27Bs along a direction parallel to the bus electrodes 12b and 13b, and the discharge cells 27R, 27G, and 27B extend the length direction of the address electrode 21. The third partition wall 25b which is divided into a plurality of parts along the second partition wall member 25b of discharge cells adjacent in the longitudinal direction of the address electrode 21 in the longitudinal direction of the address electrode 21. The member 25c is included, and the second partition member 25b is formed to intersect the first partition member 25a at a predetermined inclination angle.

In addition, discharge cells 27R, 27G, and 27B partitioned by the partition walls 25 pass through the center, particularly when the centers of the non-discharge regions 26 are referred to as shown in FIG. 2. It is arranged one by one in each of the first to fourth quadrants (1 to ④) of the coordinates formed by the horizontal axis (H) and the vertical axis (V), respectively, in the longitudinal direction of the discharge sustain electrodes (12, 13), that is, in the X-axis direction. Adjacent ones are formed to share the first partition wall member 25a. In other words, the discharge cells in the first quadrant ① of FIG. 2 become discharge cells in the second quadrant when the non-discharge area adjacent to the right is centered.

In addition, the widths of both end portions positioned in the longitudinal direction (the Y-axis direction in the drawing) of the address electrode 21 become narrower as the distance from the center of each discharge cell 27R, 27G, 27B. 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, and 27B, the narrower it becomes. In this embodiment, both ends of the discharge cells 27R, 27G, 27B have a trapezoidal shape, and the overall planar shape of each discharge cell 27R, 27G, 27B forms an octagon.

Subsequently, red (R), green (G), and blue (B) phosphors are applied to discharge cells 27R, 27G, and 27B, respectively, to form phosphor layers 29R, 29G, and 29B.

Meanwhile, a plurality of discharge sustain electrodes 12 and 13 are formed on an inner surface of the first substrate 10 along a direction crossing the address electrode 21 (the X-axis direction in the drawing). A dielectric layer and an MgO passivation layer are formed on the entire surface of the first substrate 10 while covering the discharge sustain electrodes 12 and 13. 1 and 2 do not show the dielectric layer and the MgO protective film for the sake of simplicity.

The discharge sustain electrodes 12 and 13 are formed in a stripe pattern and correspond to the pair of bus electrodes 12b and 13b corresponding to each of the discharge cells 27R, 27G and 27B, and the respective discharges from the bus electrodes 12b and 13b. It consists of a pair of protruding electrodes 12a and 13a which extend into the cells 27R, 27G and 27B to face each other, and the bus electrodes 12b and 13b are discharge cells (see FIG. 2). On the non-discharge region 26 outside of the 27R, 27G, and 27B.

When the bus electrodes 12b and 13b are disposed on the non-discharge area 26 as described above, unnecessary discharge may be generated between the bus electrodes of the discharge cells neighboring in the longitudinal direction of the address electrode 21. For example, when the distance G between bus electrodes of neighboring discharge cells is within 140 μm, unnecessary discharge is likely to occur.

In order to prevent such a problem, the partition wall 25 of the present embodiment further includes a discharge inhibiting partition member 25d between bus electrodes of neighboring cells disposed adjacent along the length direction of the address electrode 21. 1 and 2, the discharge suppression partition member 25d is shown as connecting the third partition member 25c, but this is not essential, and the discharge suppression partition member 25d is a third one. It may not be connected to the partition member 25c.

According to the barrier rib structure of the above-described configuration, even when the bus electrodes 12b and 13b are disposed on the non-discharge region 26 to prevent the luminance deterioration due to the decrease in the aperture ratio, unnecessary discharge occurs between the bus electrodes of neighboring discharge cells. Can be prevented.

Meanwhile, in the discharge sustaining electrodes 12 and 13 having the above-described configuration, the protruding electrodes 12a and 13a may be transparent electrodes, particularly indium tin oxide (ITO) electrodes, and may be used as bus electrodes 12b and 13b. The metal electrode can be used.

The protruding electrodes 12a and 13a are formed such that the rear ends corresponding to both ends of the discharge cells 27R, 27G and 27B become narrower as they move away from each center of the discharge cells 27R, 27G and 27B. do. The protruding electrodes 12a and 13a may be formed so that both sides of the rear end portions corresponding to both end portions of the discharge cells 27R, 27G and 27B are parallel to the inner walls of the discharge cells 27R, 27G and 27B. In particular, in the present embodiment, the rear ends of the protruding electrodes 12a and 13a have a trapezoidal shape that becomes narrower to match the end shapes of the discharge cells 27R, 27G and 27B.

Fig. 3 shows a plan view of principal parts of a PDP showing a modification of the first embodiment described above. The PDP according to the present modification has a basic structure similar to that of the PDP according to the first embodiment described above, and includes a discharge cell formed on the second substrate 20 and / or a discharge sustain electrode formed on the first substrate 10. The shape is changed to improve the discharge efficiency.

In the following modifications, the same components as those of the first embodiment described above use the same reference numerals, and detailed descriptions of these components are omitted.

3 is formed so that both ends of the discharge cell have an arc shape, and the protruding electrodes 12'a and 13'a of the discharge sustaining electrode are formed such that the widthwise centers of the ends facing each other are concave than both of these centers. PDP is shown. As such, by forming a recess in the center portion of the end of the protruding electrodes 12'a and 13'a, a gap is formed between the protruding electrodes 12'a and 13'a facing each other in one discharge cell. That is, a long gap (G1) is formed in the concave portions facing each other, and a short gap (G2) is formed in the portions facing the convex portions on both sides of the concave portion. Plasma discharge can be more efficiently diffused and thus the discharge efficiency can be increased.

By forming only a concave portion at the center of the protruding electrodes 12'a and 13'a, both concave portions thereof can be relatively convex, and both the concave portion and the convex portion may be formed around a normal end reference line. have. In addition, both of the pair of protruding electrodes 12'a and 13'a corresponding to each discharge cell may have the above-described shape, and only one of them may have the above-described shape. In addition, the concave portions and the convex portions of the protruding electrodes 12'a and 13'a may preferably have their edges smoothly curved.

Although the shapes of the discharge cells and the protruding electrodes are all changed in the modified example of FIG. 3, this is not essential, and the protruding electrodes of FIGS. 1 and 2 are applied to the discharge cell structure of FIG. 3, or FIGS. 1 and 2. It is also possible to apply the protruding electrode of FIG. 3 to the discharge cell structure of FIG.

4 to 6 are views showing the configuration of main parts of the PDP according to the second to fourth embodiments of the present invention. In particular, the non-discharge area on the line in a direction parallel to the discharge sustaining electrode is spaced between the rows of discharge cells. It is formed on.

That is, the partition of the embodiment shown in FIG. 4 has a partition structure having a shape in which the third partition member 25c is removed from the partition structure of the first embodiment described above. Accordingly, the plurality of discharge cells arranged in the direction parallel to the bus electrodes 12b and 13b share the first partition member 25a in the direction parallel to the address electrode, and each of the discharge cells is formed in the second partition member ( Both ends are closed by 25b). In order to suppress unnecessary discharge between the bus electrodes 12b and 13b disposed on the non-discharge region 26, a discharge suppression barrier member 25d is provided in the non-discharge region 26 between the second partition member 25b. It is arrange | positioned in the direction parallel to bus electrodes 12b and 13b.

In addition, the embodiment shown in FIG. 5 has the same configuration as the above-described embodiments except that the partition wall is formed in a rectangular planar shape, and the embodiment shown in FIG. 6 shows that each discharge cell has a first partition wall. Except for having a waffle-shaped partition wall structure of a shape that does not share the member (25a) has the same configuration as the above-described embodiments.

Although not shown, the discharge sustaining electrodes of FIGS. 1 to 3 described above in the embodiments of FIGS. 4 to 6 may be combined in various forms, and the above configurations also fall within the scope of the present invention. Of course.

According to the present invention, the height of at least one of the first to third partition members and the discharge suppression partition member is lower than that of the other partition members, whereby the exhaust passage between the partition member and the first substrate having a low height is formed. It is also possible to make it possible to effectively perform the exhaust process before the injection of the discharge gas.

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, the PDP of the present invention can improve the discharge efficiency by optimizing the shape of the discharge area in consideration of the diffusion form of the discharge gas, and the bus electrode is disposed in the non-discharge area, thereby preventing the reduction of the aperture ratio due to the bus electrode. Brightness can be improved.

The space between the bus electrodes of adjacent discharge cells adjacent to each other in the longitudinal direction of the address electrode is narrow, and generation of unnecessary discharge in the non-discharge region can be suppressed by the sustain pulses applied to both bus electrodes.

Therefore, there is an effect that can solve the problems of power increase and color purity decrease due to unnecessary discharge.

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

2 is a plan view showing the assembled state of FIG.

3 is a plan view illustrating a first modification of FIGS. 1 and 2.

4 is an exploded perspective view illustrating a second modification of FIGS. 1 and 2.

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

6 is a plan view of a plasma display panel according to a third embodiment of the present invention;

Claims (21)

First and second substrates disposed to face each other; Discharge sustain electrodes and address electrodes provided on the first and second substrates, respectively; The first and first discharge cells and the non-discharge regions are arranged in rows in a direction orthogonal to the address electrodes, and the discharge cells and the non-discharge regions of each column are alternately disposed along the length direction of the address electrodes. A partition wall disposed in a space between the two substrates; A phosphor layer formed in each discharge cell; The discharge sustaining electrode includes a pair of protruding electrodes disposed to face each discharge cell, and a pair of bus electrodes electrically connected to the protruding electrodes, wherein the partition wall extends in a length direction of the address electrode. A plasma display panel comprising a barrier member for discharge suppression between bus electrodes disposed in a non-discharge region between adjacent discharge cells. The plasma display of claim 1, wherein the partition includes a first partition member that partitions the discharge cells along a length direction of a bus electrode, and a second partition member that partitions the discharge cells along a length direction of an address electrode. panel. The plasma display panel of claim 2, wherein the barrier rib further comprises a third barrier member connecting the second barrier members of the discharge cells adjacent in the length direction of the address electrode. The quadrant of any one of claims 1 to 3, wherein the discharge cells are each one to four quadrants of coordinates formed by a horizontal axis and a longitudinal axis passing through the center, based on the center of each non-discharge area. Plasma display panels, each arranged one by one. The plasma display panel of claim 4, wherein each of the discharge cells is formed to be narrower as the widths of both ends located along the length direction of the address electrode are farther from the center of the discharge cells. The plasma display panel of claim 5, wherein both ends of the discharge cell have a trapezoidal shape. The plasma display panel of claim 5, wherein both ends of the discharge cell have an arc shape. 6. The plasma display panel of claim 5, wherein both sides of the rear end portions corresponding to both end portions of the discharge cells are formed in parallel with the inner wall of the discharge cells. The plasma display panel of claim 5, wherein the protruding electrode is formed such that its rear ends corresponding to both ends of the discharge cell become narrower from the center of the discharge cell. 6. The plasma display panel of claim 5, wherein each of the protruding electrodes has a concave portion and a convex portion at opposite ends thereof. The plasma display panel of claim 10, wherein the concave portion is formed at a central portion in the width direction of the protruding electrode, and the convex portion is formed at both sides of the convex portion in the width direction of the protruding electrode. The plasma display panel of claim 1 or 2, wherein the discharge cells are partitioned into a plurality of columns along the length direction of the address electrode by non-discharge regions on a line formed in a direction parallel to the bus electrode. The plasma display panel of claim 12, wherein each of the discharge cells formed by the first and second partition members is formed in a flat quadrangle. The plasma display panel of claim 12, wherein each of the discharge cells formed by the first and second partition members is formed in a flat octagonal shape or a flat elliptical shape. 15. The plasma display panel of claim 14, wherein each of the discharge cells is formed to be narrower as the widths of both ends located in the longitudinal direction of the address electrode become farther from the center of the discharge cells. The plasma display panel of claim 15, wherein both ends of the discharge cell have a trapezoidal shape. The plasma display panel of claim 15, wherein both ends of the discharge cell have an arc shape. The plasma display panel of claim 15, wherein both sides of the rear end portions of the protruding electrodes corresponding to both end portions of the discharge cells are formed parallel to an inner wall of the discharge cell. The plasma display panel of claim 15, wherein the protruding electrode has a smaller width as rear ends corresponding to both ends of the discharge cell move away from a center of the discharge cell. The plasma display panel of claim 15, wherein each of the protruding electrodes has a concave portion and a convex portion at opposite ends thereof. 21. The plasma display panel of claim 20, wherein the concave portion is formed at a central portion in the width direction of the protruding electrode, and the convex portion is formed at both sides of the convex portion in the width direction of the protruding electrode.