KR20060024216A - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel capable of improving color temperature.

A plasma display panel according to the present invention comprises: a plurality of discharge cells arranged in the order of red, blue and green; It is characterized in that it comprises a plurality of partition walls for separating each discharge cell.

By this arrangement, the present invention can improve the contrast of the red, blue and green discharge cells and control the color temperature. In addition, the present invention can increase the driving margin of the discharge cells.

Description

Plasma Display Panel             

1 is a perspective view showing a conventional plasma display panel.

FIG. 2 is a plan view of the plasma display panel shown in FIG. 1; FIG.

3 is a plan view showing another black matrix of a conventional plasma display panel.

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

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

6 is a plan view illustrating the electrode and the black matrix shown in FIGS. 4 and 5.

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

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

2X, 102X, 202X: address electrode 4Y, 104Y, 204Y: scan / hold electrode

4Z, 104Z, 204Z: Common sustain electrode 6, 106, 206: Phosphor                 

8, 108, 208: bulkhead 10, 110, 210: protective film

12, 112, 212: upper dielectric layer 14, 114, 214: lower substrate

16, 116, 216: upper substrate 18, 118, 218: lower dielectric layer

20, 120, 220: Black Matrix 230: Black Top

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel capable of improving color temperature.

A plasma display panel (hereinafter referred to as "PDP") is a display device that uses visible light generated from a phosphor when vacuum ultraviolet rays generated by gas discharge excite the phosphor.

PDP is thinner and lighter than Cathode Ray Tube (CRT), which has been the mainstay of display means, and has the advantage of being able to realize high-definition large screen. The PDP is composed of a plurality of discharge cells arranged in a matrix form.

1 and 2, a discharge cell of a conventional three-electrode AC surface discharge type PDP includes a scan / hold electrode 4Y and a common sustain electrode 4Z formed on an upper substrate 16, and a lower substrate 14. Has an address electrode 2X formed thereon. Here, the sustain electrode pairs 4Y and 4Z are composed of the transparent electrode 4a and the bus electrode 4b.                         

The upper dielectric layer 12 and the passivation layer 10 are stacked on the upper substrate 16 having the scan / sustain electrode 4Y and the common sustain electrode 4Z side by side. The upper dielectric layer 12 is formed in a multi-layer structure, and preferably formed of the first and second upper dielectric layers 12a and 12b. In this upper dielectric layer 12, wall charges generated during plasma discharge are accumulated.

The protective film 10 prevents damage to the upper dielectric layer 12 due to sputtering generated during plasma discharge and increases discharge efficiency of secondary electrons. As the protective film 10, magnesium oxide (MgO) is usually used.

The lower dielectric layer 18 and the partition wall 8 are formed on the lower substrate 14 on which the address electrode 2X is formed, and the phosphor layer 6 is coated on the surfaces of the lower dielectric layer 18 and the partition wall 8. The address electrode 2X is formed in the direction crossing the scan / sustain electrode 4Y and the common sustain electrode 4Z.

The partition wall 8 is formed in parallel with the address electrode 2X to prevent the ultraviolet rays and the visible light generated by the discharge from leaking to the adjacent discharge cells. The phosphor layer 6 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red (R), green (G), and blue (B). Inert gas for gas discharge is injected into the discharge space provided between the upper substrate 16 / lower substrate 14 and the partition 8.

The PPD has a first upper dielectric layer 12a and a second upper dielectric layer along the partition wall 8 in a direction intersecting the sustain electrode pairs 4Y and 4Z to minimize interference between adjacent discharge cells and to improve contrast of the screen. The black matrix 20 is formed between 12b. Alternatively, the black matrix 22 is formed as shown in FIG. 3 in a direction crossing the partition wall 8 between the scan / hold electrode 4Y and the common sustain electrode 4Z respectively formed in the discharge cells adjacent to each other. .

The discharge cell of this structure is selected by the counter discharge between the address electrode 2X and the scan / hold electrode 4Y, and then the discharge cell is held by the surface discharge between the sustain electrode pairs 4Y and 4Z. In the discharge cell, the fluorescent substance 6 emits light by ultraviolet rays generated during sustain discharge, so that visible light is emitted outside the cell to display an image.

In the conventional PDP, discharge cells having a constant width are formed with the partition wall 8 interposed therebetween. Since the discharge cells of the phosphor layers 6 of red (R), green (G) and blue (B) are different from each other, the discharge cells realize red (R), green (G) and blue (B). The luminous luminances of are different. In particular, the emission luminance of discharge cells implementing green (G) is higher than that of discharge cells implementing red (R) and blue (B), and the emission luminance of discharge cells implementing red (R) is blue ( The light emitting luminance of the discharge cells implementing B) has higher characteristics. In this case, there is a problem in that the overall color temperature of the PDP is lowered due to the low luminance of the discharge cells implementing blue (B).

Accordingly, an object of the present invention is to provide a plasma display panel capable of improving color temperature.

In order to achieve the above object, a plasma display panel according to an embodiment of the present invention comprises a plurality of discharge cells arranged in the order of red, blue and green; A plurality of partitions are provided for separating each discharge cell.

The plasma display panel according to an exemplary embodiment of the present invention may further include a black matrix formed to overlap the partition wall separating the red and green discharge cells among the plurality of partition walls.

The black matrix may overlap the partition wall so as to be biased to the green discharge cell.

The aperture ratio of the blue discharge cells is greater than the aperture ratios of the red and green discharge cells, and the aperture ratio of the red discharge cells is greater than that of the green discharge cells.

The distance between the plurality of partitions is characterized in that the same.

The width of the partition wall separating the red and green discharge cells among the plurality of partition walls may be wider than the partition wall separating the green and blue discharge cells or the partition wall separating the red and blue discharge cells.

The plasma display panel according to an exemplary embodiment of the present invention may further include a light blocking layer formed on an upper surface of a partition wall separating the red and green discharge cells from the plurality of partition walls.

The partition wall separating the red and green discharge cells may be formed to be biased toward the green discharge cells.                     

The distance between the plurality of partitions is characterized in that different.

The discharge space of the blue discharge cell is larger than the discharge space of the red and green discharge cells, and the discharge space of the red discharge cell is larger than the discharge space of the green discharge cell.

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. 4 to 6.

4 and 5, the plasma display panel according to the first embodiment of the present invention includes a plurality of discharge cells arranged in the order of red (R), blue (B), and green (G), and each discharge cell. And a black matrix 120 formed to overlap the partition 108 for separating the red (R) and green (G) discharge cells.

Each discharge cell includes a pair of sustain electrodes including a scan / sustain electrode 104Y and a common sustain electrode 104Z formed on the upper substrate 116, and an address electrode 102X formed on the lower substrate 114. Equipped. Here, the scan / sustain electrode 104Y and the common sustain electrode 104Z each comprise a transparent electrode 104A and a bus electrode 104B.

The upper dielectric layer 112, the black matrix 120, and the passivation layer 110 are stacked on the upper substrate 116 on which the scan / sustain electrode 104Y and the common sustain electrode 104Z are arranged side by side.

The upper dielectric layer 112 is formed of a single layer or multiple layers, and preferably consists of the first and second upper dielectric layers 112a and 112b. Wall charges generated during plasma discharge are accumulated in the upper dielectric layer 112.

The black matrix 120 overlaps with the partition 108 separating the discharge cells of red (R) and green (G), and is formed to be biased to the discharge cells of green (G). Specifically, the black matrix 120 is formed on the upper dielectric layer 112 overlapping the partition 108 separating the discharge cells of red (R) and green (G). In this case, as illustrated in FIG. 6, the black matrix 120 has a width W1 overlapping the discharge cell of green G being larger than a width W1 overlapping the discharge cell of red R.

Meanwhile, the black matrix 120 is formed to overlap the partition 108 separating the discharge cells of red (R) and green (G), while not formed on the other partition 108. That is, the black matrix 120 is formed on the partition wall 108 that separates the discharge cells of red (R) and blue (B), and the partition wall 108 that separates the discharge cells of blue (B) and green (G). It doesn't work.

The passivation layer 110 prevents damage to the upper dielectric layer 112 by sputtering generated during plasma discharge and increases discharge efficiency of secondary electrons. As the protective film 110, magnesium oxide (MgO) is usually used.

The lower dielectric layer 118 and the partition 108 are formed on the lower substrate 114 on which the address electrode 102X is formed, and the phosphor layer 106 is coated on the surfaces of the lower dielectric layer 118 and the partition 108. The address electrode 102X is formed in the direction crossing the scan / sustain electrode 104Y and the common sustain electrode 104Z.

The partition 108 is formed in parallel with the address electrode 102X to prevent ultraviolet rays and visible light generated by the discharge from leaking into adjacent discharge cells. At this time, the distance between adjacent partitions 108 is the same.

The phosphor layer 106 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red (R), green (G), and blue (B). Inert gas for gas discharge is injected into the discharge space provided between the upper substrate 116 and the lower substrate 114 and the partition 108.

In the PDP according to the first embodiment of the present invention, since the black matrix 120 is formed to overlap the partition 108 separating the discharge cells of red (R) and green (G), red (R) and blue The aperture ratios of each of the (B) and green (G) discharge cells have different sizes. Specifically, the opening ratio of the blue (B) discharge cells is the largest, and the opening ratio of the green (G) discharge cells is the smallest due to the black matrix 120 formed to be biased to the green (G) discharge cells. In this case, the black matrix 120 may have a partition wall that separates the red (R) and blue (B) discharge cells according to the type of the phosphor layer formed in the red (R), green (G), and blue (B) discharge cells ( It may be formed to overlap the 108 or to overlap the partition 108 for separating the discharge cells of the green (G) and blue (B).

The PDP according to the first embodiment of the present invention arranges the discharge cells in the order of red (R), blue (B) and green (G), and uses the black matrix 120 to red (R) and blue. The aperture ratios of the (B) and green (G) discharge cells are formed at different ratios. Accordingly, in the PDP according to the first embodiment of the present invention, the red (R), blue (B), and green (G) discharge cells have the same discharge space, thereby increasing the driving margin.

In addition, the PDP according to the first embodiment of the present invention has different areas covering the discharge space of each discharge cell according to the light emission luminance of the discharge cells by the black matrix 120, and thus red (R), blue (B) and green. (G) The contrast of the discharge cells can be improved and the color temperature can be controlled.

Meanwhile, referring to FIG. 7, the PDP according to the second embodiment of the present invention includes a plurality of discharge cells arranged in the order of red (R), blue (B), and green (G), and a partition wall separating each discharge cell. 208, and the width of the partition 208RG separating the red (R) and green (G) discharge cells among the partitions 208 is wider than that of the other partitions 208RB and 208BG.

Each discharge cell includes a sustain electrode pair including a scan / hold electrode 204Y and a common sustain electrode 204Z formed on the upper substrate 216, and an address electrode 202X formed on the lower substrate 214. Equipped. The scan / sustain electrode 204Y and the common sustain electrode 204Z each include a transparent electrode 204A and a bus electrode 204B.

The upper dielectric layer 212, the black matrix 220, and the passivation layer 210 are stacked on the upper substrate 216 having the scan / suspension electrode 204Y and the common sustain electrode 204Z side by side.

The upper dielectric layer 212 is formed of a single layer or multiple layers, and preferably consists of first and second upper dielectric layers 212a and 212b. Wall charges generated during plasma discharge are accumulated in the upper dielectric layer 212.

The black matrix 220 is formed to overlap the partition wall 208RG separating the discharge cells of red (R) and green (G). Specifically, the black matrix 220 is formed on the upper dielectric layer 212 overlapping the partition 208RG separating the discharge cells of red (R) and green (G).

On the other hand, the black matrix 220 is formed to overlap the partition 208RG separating the red (R) and green (G) discharge cells, while not being formed on the other partitions 208RB and 208BG. That is, the black matrix 220 is formed on the partition wall 208RB for separating the red (R) and blue (B) discharge cells, and on the partition wall 208BG for separating the blue (B) and green (G) discharge cells. It doesn't work.

The passivation layer 210 prevents damage to the upper dielectric layer 212 due to sputtering generated during plasma discharge and increases discharge efficiency of secondary electrons. As the protective film 210, magnesium oxide (MgO) is usually used.

The lower dielectric layer 218 and the partition wall 208 are formed on the lower substrate 214 on which the address electrode 202X is formed, and the phosphor layer 206 is coated on the surfaces of the lower dielectric layer 218 and the partition wall 208. The address electrode 202X is formed in the direction crossing the scan / sustain electrode 204Y and the common sustain electrode 204Z.

The partition wall 208 is formed in parallel with the address electrode 202X to prevent ultraviolet rays and visible light generated by the discharge from leaking into adjacent discharge cells. Specifically, the width of the barrier rib 208RG separating the red (R) and green (G) discharge cells among the barrier ribs 208 is wider than that of the other barrier ribs 208RB and 208BG, and is formed in the discharge cell of the green (G). It is formed to be biased. In other words, the partition wall 208RG is formed by extending the width toward the discharge cell of green (G).

At this time, the partition walls 208RB separating the red (R) and blue (B) discharge cells and the partition walls 208BG separating the blue (B) and green (G) discharge cells are equal to each other. As a result, the distance between adjacent partitions 208 becomes different. As a result, due to the partition wall 208RG formed to be inclined to the green (G) discharge cell, the discharge space of the blue (B) discharge cell is the largest, and the discharge space of the green (G) discharge cell is the smallest.

The black top (or light shielding layer) 230 is formed on the top surface of the partition wall 208RG separating the red and green discharge cells. The black top 230 prevents ultraviolet rays and visible light generated by the discharge between the red (R) and green (G) discharge cells from leaking to the adjacent discharge cells.

The phosphor layer 206 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red (R), green (G), and blue (B). Inert gas for gas discharge is injected into the discharge space provided between the upper substrate 216 and the lower substrate 214 and the partition wall 208.

The PDP according to the second embodiment of the present invention arranges discharge cells in the order of red (R), blue (B), and green (G), and uses red (R) and blue ( B) and the discharge spaces of the green (G) discharge cells are formed at different ratios. Accordingly, the PDP according to the second embodiment of the present invention can increase the driving margin of the red (R), blue (B) and green (G) discharge cells.

In addition, the PDP according to the second embodiment of the present invention improves the contrast of the red (R), blue (B) and green (G) discharge cells because the discharge spaces of the discharge cells are different from each other according to the emission luminance of the discharge cells. Can control color temperature.

As described above, the plasma display panel according to the present invention can improve the contrast of the red, blue and green discharge cells and control the color temperature. In addition, the present invention can increase the driving margin of the discharge cells.

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.

Claims (8)

A plurality of discharge cells arranged in the order of red, blue and green; And a plurality of partition walls for separating the discharge cells. The method of claim 1, And a black matrix formed to overlap the partition wall separating the red and green discharge cells from the plurality of partition walls, wherein the black matrix overlaps the partition wall so as to be biased to the green discharge cell. Plasma display panel, characterized in that. The method of claim 2, And a distance between the plurality of partitions is the same. The method of claim 1, Among the plurality of partition walls, the width of the partition wall separating the red and green discharge cells is wider than the partition wall separating the green and blue discharge cells or the partition wall separating the red and blue discharge cells. panel. The method of claim 4, wherein And a light shielding layer formed on an upper surface of a partition wall separating the red and green discharge cells from the plurality of partition walls. The method of claim 4, wherein The partition wall separating the red and green discharge cells is formed to be biased toward the green discharge cell. The method of claim 4, wherein And a distance between the plurality of partition walls is different from each other. The method according to any one of claims 4 to 7, And a discharge space of the blue discharge cells is larger than a discharge space of the red and green discharge cells, and a discharge space of the red discharge cells is larger than a discharge space of the green discharge cells.

Images