KR100482325B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel that can facilitate the exhaust and improve the luminous efficiency.

The plasma display panel according to the present invention is a delta-type partition wall for allowing red, green, and blue subpixels to be arranged in a delta shape, and a delta type of the first and second subpixels corresponding to two colors of the red, green, and blue colors. A first exhaust path formed in the partition wall to exhaust gas of the first and second subpixels, and a delta-shaped partition wall of the third subpixel corresponding to the other color to form a gas exhaust of the third subpixel. A second exhaust path is provided. The third subpixel is larger than the first and second subpixels.

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 that can facilitate emission and improve luminous 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 Display (LCD), Field Emission Display (FED), Plasma Display Panel (PDP), and Electro-Luminescence (EL). And display devices. Among them, PDP has an advantage that it is easy to manufacture a large panel as a display device using gas discharge. As shown in FIG. 1, a three-electrode AC surface discharge type PDP having three electrodes and driven by an AC voltage is representative of the PDP.

Referring to FIG. 1, a discharge cell of a three-electrode alternating surface discharge PDP includes a pair of sustain electrodes 12Y and 12Z formed on an upper substrate 10 and an address electrode 12X formed on a lower substrate 18. Equipped.

The sustain electrode pairs 12Y and 12Z are constituted by the scan electrode 12Y and the sustain electrode 12Z, and the sustain electrode pairs 12Y and 12Z each consist of the transparent electrode 12a and the bus electrode 12b. 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 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 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, visible light is emitted to the outside of the cell by the phosphor 20 emitting light by ultraviolet rays generated during sustain discharge. 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 structure illustrated in FIG. 2 and a well structured partition structure illustrated in FIG. 3. Here, in the case of the stripe-type barrier rib structure, the stripe-type barrier rib structure is easy to exhaust the discharge gas, but has a disadvantage of low luminance due to the small coating area of the phosphor 20. On the other hand, in the case of the well-shaped partition structure, the coating area of the phosphor 20 can be increased to increase the brightness, but there is a problem that the gas is not exhausted well.

In order to solve the problems of the stripe-type and well-formed partitions, a delta-type partition structure as shown in FIG. 4 has been proposed. The delta-type partition wall 24 has a structure in which one discharge cell is surrounded by six surfaces and connected to narrow channels 28. In this structure, one discharge cell is surrounded by six surfaces, so that the luminance can be improved by increasing the coating area of the phosphor and the reflectance of the partition wall, and each discharge cell is connected by a narrow channel 28 to facilitate exhaust or gas injection. can do. In addition, since the discharge start voltage in the narrow channel 28 is higher than the relatively wide channel, it has an advantage of preventing crosstalk in the partition wall direction. In addition, the bulkhead manufacturing method or driving method is the same as the existing one can be obtained an increase in brightness and efficiency without additional processes.

However, since the sustain electrodes 12Z and 12Y are symmetrically positioned in all the discharge cells, unlike the other structure, the metal bus electrode 12b is positioned at the center of the transparent electrode 12a. For this reason, light in the upper and lower portions of the cell is blocked by the bus electrode 12b, so that black lines appear in the direction of the bus electrode 12b, thereby reducing the luminance.

In order to solve this problem, a PDP having a rectangular delta partition structure shown in FIG. 5 has been proposed.

A PDP having a square delta partition wall extends from the first and second bus electrodes 32Y and 32Z, the first transparent electrode 34Y extending from the first bus electrode 32Y, and the second bus electrode 32Z. The second transparent electrode 34Z is provided. The first transparent electrode 34Y and the first bus electrode 32Y are used as scan electrodes, and the second transparent electrode 34Z and the second bus electrode 32Z are used as sustain electrodes.

The rectangular delta partition 42 has a plurality of first partitions 36 formed in parallel with the first bus electrode 32Y and intersects with the first partition 36 to connect the first partitions 36. The second partition 38 is formed.

In the PDP having the square delta partition 42, the electrode electrode 30A has a wide electrode area at a portion corresponding to the discharge space provided by the square delta partition 42 as shown in FIG. 6. In the other areas, the width of the address electrode 30 is narrowed. The narrow portion of the address electrode 30 is positioned under the rectangular delta partition 42 to prevent crosstalk with neighboring cells.

As described above, one discharge cell is surrounded by a slope by the square delta partition 42 and the coating area of the phosphor is increased, and the luminance may be improved due to an increase in reflectance of the partition. In addition, the barrier rib manufacturing method or the driving method is the same as the conventional one can increase the brightness and efficiency without additional processes. However, due to the sealed bulkhead structure of the top, bottom, left and right, the discharge time of the discharge gas is longer than that of the stripe-type partition wall, which makes it difficult to mass-produce. In addition, as the resolution of the conventional PDP increases, the size of the discharge cells decreases, and the discharge cells having a rectangular delta structure have shorter lengths of upper and lower sides than left and right, so that the first and second transparent electrodes 34Y, 34Z) becomes shorter. As a result, the luminance decreases as the driving voltage increases.

Accordingly, an object of the present invention is to provide a plasma display panel which can facilitate the exhaust and improve the luminous efficiency. Another object of the present invention is to provide a plasma display panel which is adapted to balance color.

In order to achieve the above object, the plasma display panel according to the present invention includes a delta-type partition wall for allowing red, green, and blue subpixels to be disposed in a delta type, and first and second colors corresponding to two colors of the red, green, and blue colors. A third exhaust path formed in the delta partition wall of the second subpixel and formed in the delta partition wall of the third subpixel corresponding to the other color, and a first exhaust path for gas exhaust of the first and second subpixels; And a second exhaust path for gas exhaust of the subpixels. The third subpixel is larger than the first and second subpixels. The plasma display panel further includes an address electrode having a narrow width in a region corresponding to the delta type partition wall, and having a width wider than a portion corresponding to the partition wall in a discharge space surrounded by the delta type partition wall. The first exhaust passage connects the first subpixel up and down, and connects the second subpixel up and down. The delta-type partition wall includes a first partition wall arranged in a horizontal direction and a second partition wall formed in a direction crossing the first partition walls and connecting the first partition walls. The second partition is separated in two by the second exhaust passage. The address electrode is formed at a portion corresponding to the second exhaust path.

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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. 7 to 12.

FIG. 7 illustrates a delta-type partition wall of the plasma display panel according to the first embodiment of the present invention.

Referring to FIG. 7, in the PDP according to the first embodiment of the present invention, subpixels corresponding to two colors of R, G, and B are arranged in a vertical line. The same color subpixels arranged in a row are connected to each other by an exhaust path having a predetermined distance d in the delta partition 60.

The PDP according to the present invention has a delta structure in which discharge cells positioned up and down adjacent to each other form one pixel. At this time, the partition wall 60 has a rectangular delta structure. The delta type partition wall 60 is formed in a direction crossing the first partition wall 60A and a plurality of first partition walls 60A formed parallel to each other in a horizontal direction to connect the first partition wall 60A to each other. A partition wall 60B is provided to partition discharge cells. In this case, the R, G, and B subpixels are formed on the second partition 60B by the n th partition partition line corresponding to the first partition 60A (where n is a natural number of 1 or more) and the n + 1 th partition wall line. Are arranged in a triangle shape.

Subpixels are arranged in order of R, G, and B subpixels in each partition line of the conventional PDP, whereas in the PDP according to the present invention, the subpixels located in the nth (n is a natural number of 1 or more) partition lines are R The subpixels, the B subpixels, and the G subpixels are arranged in this order, and the subpixels positioned in the n + 1th partition wall line are arranged in the order of the R subpixel, the G subpixel, and the B subpixel. Accordingly, in the present invention, the subpixels corresponding to the two colors among the R, G, and B colors are vertically connected via the exhaust passage 65, and the discharge spaces of the subpixels corresponding to the other color are not vertically adjacent. They exist independently. As the subpixels of the same color are adjacent to each other up and down, luminous efficiency may be improved.

In addition, only one subpixel of the R, G, and B subpixels is obliquely blocked on the delta partition 60, and an exhaust passage 65 having a predetermined distance d is formed in the two subpixels to inject discharge gas. And easy to exhaust. For example, as shown in FIG. 7, only the R subpixel is obliquely blocked, and the other two G and B subpixels have an exhaust path 65 formed therein and are connected up and down.

As shown in FIG. 8, the PDP having the barrier rib structure includes first and second bus electrodes 62Y and 62Z so as to correspond to the first barrier rib 60A of the delta-type barrier rib 60. A first transparent electrode (not shown) extending from the bus electrode 62Y and a second transparent electrode (not shown) extending from the second bus electrode 62Z are provided. The first transparent electrode and the first bus electrode 62Y are used as scan electrodes, and the second transparent electrode and the second bus electrode 62Z are used as sustain electrodes.

The address electrode 64 is formed to correspond to the second partition wall 60B of the delta partition wall 60, and has an electrode width 64A wider than other portions in the discharge space in which the address discharge occurs, and the address in other areas. The width of the electrode 64 is formed to be narrow. The narrow portion of the address electrode 64 is positioned under the delta partition wall 60 to prevent cross talk with neighboring cells.

FIG. 9 illustrates a delta-type partition wall of the plasma display panel according to the second embodiment of the present invention.

Referring to FIG. 9, in the PDP according to the present invention, subpixels corresponding to two colors of R, G, and B are arranged in a vertical line. Subpixels of the same color arranged in a line are formed in the delta-shaped partition wall 60 with a first exhaust path 76 having a predetermined first distance d1 and connected to each other, and in subpixels corresponding to the other color. A first exhaust passage 78 having a second interval d2 is formed.

The PDP according to the present invention has a delta structure in which discharge cells positioned up and down adjacent to each other form one pixel. At this time, the partition wall 70 has a rectangular delta structure.

The delta-type partition wall 70 is formed of a plurality of first partition walls 70A formed in parallel with each other and a second partition wall 70B which is formed in a direction crossing the first partition wall 70A and connects the first partition wall 70A. ). In this case, R, G, and B subpixels are formed on the second partition 70B by the n th partition wall line corresponding to the first partition wall 70A (where n is a natural number of 1 or more) and the n + 1 th partition wall line. Are arranged in a triangle shape.

The delta-shaped partition wall 70 forms a second exhaust path 78 at a second interval d2 in any one of the R, G, and B subpixels in which the slope is blocked. In addition, a first exhaust path 76 having a first interval d1 is formed in the remaining two subpixels. Here, the first exhaust passage 76 is formed by removing one side of the first partition 70A, while the second exhaust passage 78 separates the second partition 70B into two to form a predetermined passage. Accordingly, since the second exhaust path 78 is further added as compared with the first embodiment of the present invention, the injection and discharge of the discharge gas are much easier.

By the way, although the subpixel in which the 2nd exhaust path 78 is formed can be any color among R, G, and B, it is advantageous to adopt B subpixel especially. As shown in FIG. 9, when the delta partition wall 70 is separated by the second exhaust path 78, the discharge space of the subpixels adjacent to the partition wall of the second exhaust path 78 is narrowed. Since the luminance of B is the lowest among the phosphors currently applied to the PDP, when the phosphor of B is applied to the subpixel having the second exhaust path 78, the application area of the phosphor B is maintained as it is, but the area of application of the R and G phosphors is relatively high. This reduces the color purity effect occurs. That is, the size of the discharge cells is asymmetric discharge cell structure different from each other to uniform the discharge intensity and luminance of the R, G, B subpixels.

Subpixels are arranged in order of R, G, and B subpixels in each partition line of the conventional PDP, whereas in the PDP according to the present invention, the subpixels located in the nth (n is a natural number of 1 or more) partition lines are R The subpixels, the B subpixels, and the G subpixels are arranged in this order, and the subpixels positioned in the n + 1th partition wall line are arranged in the order of the R subpixel, the G subpixel, and the B subpixel. Accordingly, in the present invention, the subpixels corresponding to the two colors among the R, G, and B colors are connected vertically, and the subpixels corresponding to the other color are independently not adjacent to the upper and lower sides. As the subpixels of the same color are adjacent to each other up and down, luminous efficiency may be improved.

PDP according to the present invention having such a partition structure is extended from the first and second bus electrodes and the first bus electrode so as to correspond to the first partition wall 70A of the delta-type partition wall 70, as shown in FIG. A first transparent electrode, not shown, and a second transparent electrode, not shown, extended from the second bus electrode. Here, the first transparent electrode and the first bus electrode are used as scan electrodes, and the second transparent electrode and the second bus electrode are used as sustain electrodes.

The address electrode 74 is formed to correspond to the second partition wall 70B of the delta-type partition wall 70, and the electrode width 74A is formed wider than other portions in the discharge space in which the address discharge occurs. The width of the electrode 74 is formed to be narrow. The narrow portion of the address electrode 74 is positioned under the delta partition 70 to prevent crosstalk with neighboring cells.

In addition, since the second partition wall 70B is separated to form the second exhaust path 78, the address electrode 74 is formed in a portion corresponding to the second exhaust path 78, and has an electrode width larger than that in the discharge space. 74A is formed wide.

FIG. 11 illustrates a delta-type partition wall of a plasma display panel according to a third embodiment of the present invention.

Referring to FIG. 11, in the PDP according to the present invention, an exhaust path 86 having a predetermined distance d is formed adjacent to one surface of a subpixel. Here, the PDP according to the present invention has a delta structure in which discharge cells positioned up and down adjacent to each other form one pixel.

The delta-type partition walls 80 are formed in a direction crossing the first partition walls 80A and the plurality of first partition walls 80A parallel to each other, and the second partition walls 80B connecting between the first partition walls 80A. ). By the delta-shaped partition wall 80, the subpixels are arranged in the order of R, G, and B subpixels, and one pixel is arranged in a triangular shape.

The exhaust path 86 is formed in a row so that the upper and lower subpixels are connected to facilitate the injection and exhaust of gas into the discharge space of the PDP.

The PDP in which the exhaust path 86 is formed has an advantage in that the pattern of the delta-type partition wall 80 is regularly repeated, but since subpixels of different colors are connected by the exhaust path 86, there is a fear that they are mixed during discharge. However, since exhaust paths are formed in all subpixels, it is clear that gas injection and exhaust are easier than in other embodiments.

The PDP according to the present invention having such a partition structure includes first and second bus electrodes and a first transparent electrode (not shown) extending from the first bus electrode to correspond to the first partition wall 80A of the delta partition wall 80. And a second transparent electrode (not shown) extending from the second bus electrode. Here, the first transparent electrode and the first bus electrode are used as scan electrodes, and the second transparent electrode and the second bus electrode are used as sustain electrodes.

The address electrode 84 is formed to correspond to the second partition wall 80B of the delta partition wall 80, and the electrode width 84A is formed wider than other portions in the discharge space in which the address discharge occurs, and in the other areas, the address The electrode 84 is formed to have a narrow width. The narrow portion of the address electrode 84 is positioned below the delta partition wall 80 to prevent crosstalk with neighboring cells.

As described above, in the plasma display panel according to the present invention, the subpixels located in the nth partition line are arranged in the order of R, B, and G, and the subpixels located in the n + 1th partition line are R, G, and B. Are arranged in order. Accordingly, subpixels corresponding to two colors of R, G, and B are arranged in a vertical line, and an exhaust path connecting the subpixels of the same color arranged in this line is formed. Therefore, the plasma display panel according to the present invention can facilitate exhaustion. In addition, the plasma display panel according to the present invention facilitates the exhaust by separating the delta-type partition walls even in the subpixels that exist independently, and implements an asymmetric cell structure to control the discharge intensity and luminance for each discharge cell. Color balance of R, G and B cells can be achieved.

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In addition, the plasma display panel according to the present invention can be applied to the conventional address electrode structure as it is, it is easy to drive if only the order of applying the address voltage.

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 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 well type partition wall of a conventional plasma display panel.

4 is a plan view showing a plasma display panel having a conventional delta partition.

5 is a plan view showing a plasma display panel having a conventional rectangular delta partition.

6 is a diagram illustrating an address electrode structure of a plasma display panel having a conventional rectangular delta partition wall.

7 is a plan view illustrating a delta partition wall of the plasma display panel according to the first embodiment of the present invention.

FIG. 8 is a view showing an electrode structure of the plasma display panel shown in FIG.

9 is a plan view illustrating a delta partition wall of a plasma display panel according to a second embodiment of the present invention;

FIG. 10 is a view showing an electrode structure of the plasma display panel shown in FIG. 9; FIG.

FIG. 11 is a plan view illustrating a delta partition wall of a plasma display panel according to a third exemplary embodiment of the present invention. FIG.

12 is a view showing an electrode structure of the plasma display panel shown in FIG.

<Description of Symbols for Main Parts of Drawings>

10: upper substrate 12X, 30, 64, 84: address electrode

12Y: scan electrode 12Z: sustain electrode

14,22 dielectric layer 16: protective film

18: lower substrate 20: phosphor

24, 42, 70, 80: bulkhead 32Y, 32Z, 62Y, 62Z: bus electrode

34Y, 34Z: transparent electrode

Claims (6)

A delta bulkhead that allows red, green, and blue subpixels to be placed in a delta shape, A first exhaust passage for exhausting the first and second subpixels through the delta-shaped partition walls of the first and second subpixels corresponding to two colors of the red, green, and blue colors; A second exhaust path for gas exhaust of the third subpixel through the delta partition of the third subpixel corresponding to the other color; And the third subpixel is larger than the first and second subpixels. The method of claim 1, And an address electrode having a narrow width in an area corresponding to the delta partition wall, and having an address electrode wider than a portion corresponding to the partition wall in a discharge space surrounded by the delta partition wall. The method of claim 1, And the first exhaust path connects the first subpixel up and down, and connects the second subpixel up and down. The method of claim 1, The delta partition wall, A first partition wall parallel to the horizontal direction, A second partition wall formed in a direction crossing the first partition walls and connecting the first partition walls, And the second partition wall is divided into two by the second exhaust path. The method of claim 4, wherein And the address electrode is formed at a portion corresponding to the second exhaust path. delete