KR100637064B1 - Plasma display panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel capable of displaying high-quality images by making the driving characteristics between discharge cells uniform and improving afterimage visual effects.

The plasma display panel according to an exemplary embodiment of the present invention includes a plurality of discharge cells and a plurality of partition walls for separating the discharge cells, and the partition walls have a width of approximately 100 μm to 500 μm. .

By such a configuration, the present invention minimizes the difference in voltage characteristics between the on-discharge cells and the off-discharge cells by minimizing the kinetic energy of the discharge charges moved to the adjacent discharge cells, thereby improving the driving characteristics and improving the visual characteristics of the residual image. You can. As a result, the present invention makes it possible to display the high quality image by making the driving characteristics between the discharge cells uniform and improving the afterimage visual effect.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}             

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

FIG. 2 is a cross-sectional view illustrating the plasma display panel shown in FIG. 1. FIG.

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

4 is a cross-sectional view showing the lower substrate shown in FIG.

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

FIG. 6 is a cross-sectional view illustrating a partition and a slit shown in FIG. 5. FIG.

7 is a cross-sectional view illustrating another 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

230: slit

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 capable of displaying high-quality images by making driving characteristics between discharge cells uniform and improving afterimage visual effects.

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. A black matrix (not shown) can be formed between the 12b.

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.

As described above, in the conventional PDP, the generation efficiency of visible light, the change efficiency of the phosphor 6, and the reduction of crosstalk between discharge cells are important for high-efficiency, high-quality image realization. 6) can vary greatly depending on the characteristics and the driving waveform.

In addition, in the implementation of high quality PDP, the discharge cell structure is changed from the stripe type to the closed type in order to reduce the size of the discharge cell and prevent crosstalk. This deteriorates the exhaust characteristics in conjunction with the increase in the size of the PDP, and the residual impurity gas which is not completely exhausted is a major problem in the driving characteristics and the image quality of the PDP. In particular, in the conventional PDP, due to the difference in voltage characteristics between adjacent discharge cells, that is, between on discharge cells and off discharge cells, the charge particles of the on discharge cells are turned off through the gap between the partition wall 8 and the protective film 10. (Off) Moving to the discharge cell causes boundary persistence. Accordingly, in the conventional PDP, the image quality is deteriorated due to the afterimage characteristic and the driving characteristics between the discharge cells are uneven.

Accordingly, an object of the present invention is to provide a plasma display panel which can display a high-quality image by making the driving characteristics between discharge cells uniform and improving afterimage visual effects.

In order to achieve the above object, the plasma display panel according to the embodiment of the present invention includes a plurality of discharge cells and a plurality of partition walls for separating the discharge cells, the partition wall is between about 100㎛ ~ 500㎛ It is characterized by having a width.

The plasma display panel according to the embodiment of the present invention is characterized in that it comprises at least one slit on the upper surface of the partition wall.

The slit is formed smaller than the width of the upper surface of the partition wall, characterized in that having a depth smaller than the height of the partition wall.

A plasma display panel according to an embodiment of the present invention includes a plurality of discharge cells, a plurality of partition walls for separating the discharge cells, and at least one slit on the upper surface of each partition wall.

The slit is formed smaller than the width of the upper surface of the partition wall, characterized in that having a depth smaller than the height of the partition wall.

The upper surface of the partition wall is characterized in that it has a width between about 100㎛ 500㎛.

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. 3 to 7.

3 and 4, a plasma display panel (hereinafter referred to as "PDP") according to the first exemplary embodiment of the present invention is a sequence of red (R), green (G), and blue (B). And a plurality of discharge cells arranged to have a width of about 100 μm to 500 μm, and partition walls 108 for separating each discharge cell.

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 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 formed 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 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 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.

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. Here, both side surfaces of the partition wall 108 may be formed as an inclined surface having a vertical or predetermined slope. The partition wall 108 has a width W that minimizes the kinetic energy of the discharge charges that move to the adjacent discharge cells through a gap between the top surface of the partition wall 108 and the passivation layer 110 in the ON discharge cell. Will have

Accordingly, the width W of the upper surface of the partition 108 is formed to be about 100 to 500 μm to increase the moving distance of the discharge charge. Preferably, the width W of the upper surface of the partition 108 is formed to about 200 μm.

The PDP according to the first embodiment of the present invention minimizes the kinetic energy of the discharge charges moved to the adjacent discharge cells by forming the width W of the upper surface of the partition 108 separating each discharge cell to about 200 μm. You can. Accordingly, the PDP according to the first embodiment of the present invention can improve driving characteristics by minimizing the difference in voltage characteristics between the on discharge cells and the off discharge cells, and also improve the visual characteristics of the residual image.

Referring to FIG. 5, a PDP according to a second embodiment of the present invention includes a plurality of discharge cells arranged in the order of red (R), green (G), and blue (B), and a plurality of discharge cells for separating each discharge cell. The partition wall 208 and the slit 230 formed in the upper surface of each partition wall 208 are provided.

As described above, in the PDP according to the second embodiment of the present invention, other components except for the partition wall 208 and the slit 230 are the same as the PDP according to the first embodiment of the present invention. Accordingly, in the PDP according to the second embodiment of the present invention, descriptions of other components except for the partition wall 208 and the slit 230 will be replaced with the description of the first embodiment of the present invention. .

The partition wall 208 of the PDP according to the second embodiment of the present invention is formed in parallel with the address electrode 202X to prevent ultraviolet rays and visible light generated by the discharge from leaking to the adjacent discharge cells. Here, both side surfaces of the partition wall 208 are formed as an inclined surface that is vertical or has a predetermined slope.

Each slit 230 is formed on the top surface of the partition wall 208 as shown in FIG. At this time, the width W2 of each slit 230 is formed to be smaller than the width W1 of the upper surface of the partition wall 208, and is formed about 1/5 of the width W1 of the upper surface of the partition wall 208. In addition, the depth D of each slit 230 is formed smaller than the height of the partition wall 208. For example, when the height of the partition wall 208 is formed to about 150㎛, the depth of the slit 230 is formed to about 10㎛ ~ 140㎛ preferably about 50㎛. The slit 230 reduces the kinetic energy of the discharge charges moved to the adjacent discharge cells, thereby preventing the discharge charges from moving to the adjacent discharge cells. In other words, discharge charges moving to adjacent discharge cells fall inside the slit 230, and discharge charges falling inside the slit 230 consume kinetic energy as much as the depth D of the slit 230. Therefore, the kinetic energy of the discharge charges is reduced. Accordingly, discharge charges having no kinetic energy exceeding the depth D of the slit 230 are confined inside the slit 230, thereby preventing discharge charges having low kinetic energy from moving to adjacent discharge cells. Each of these slits 230 is formed by an etching process, a photo process and a sand blast process.

As described above, in the PDP according to the second embodiment of the present invention, the slit 230 is formed on the top surface of the partition wall 208 that separates each discharge cell, thereby minimizing the kinetic energy of the discharge charges moved to the adjacent discharge cells. . Therefore, the PDP according to the second embodiment of the present invention can improve the driving characteristics by minimizing the difference in voltage characteristics between the on discharge cells and the off discharge cells, and also improve the visual characteristics of the residual image.

On the other hand, in the PDP according to the second embodiment of the present invention, the partition wall 208 has a width W1 that can minimize the kinetic energy of the discharge charge moving from the ON discharge cell to the adjacent discharge cell. Accordingly, the width W1 of the upper surface of the partition wall 208 is formed to be about 200 μm to increase the moving distance of the discharge charge. Preferably, the width W1 of the upper surface of the partition wall 208 is formed to about 200 μm to 500 μm.

As described above, in the PDP according to the second embodiment of the present invention, the width W1 of the upper surface of the partition wall 208 separating each discharge cell is formed to about 200 μm, and one slit is formed on the upper surface of the partition wall 208. 230). Therefore, the PDP according to the second embodiment of the present invention can improve driving characteristics by minimizing the difference in voltage characteristics between the on discharge cells and the off discharge cells, and also improve the visual characteristics of the residual image.

On the other hand, in the PDP according to the second embodiment of the present invention, a plurality of slits 230 are formed on the top surface of the partition wall 208 as shown in FIG. 7. Thus, by forming a plurality of slits 230 formed in the partition wall 208, it is possible to block the discharge charges moving to the adjacent discharge cells by further increasing the moving distance of the discharge charges moved to the adjacent discharge cells. Accordingly, the present invention can improve the driving characteristics by minimizing the difference in voltage characteristics between the on discharge cells and the off discharge cells, and also improve the visual characteristics of the residual image.

On the other hand, PDP according to another embodiment of the present invention forms a width (W1) of the upper surface of the partition wall 208 separating each discharge cell to about 200㎛ and at least one slit on the upper surface of the partition wall 208 By forming the 230, the kinetic energy of the discharge charges moved to the adjacent discharge cells can be minimized. Accordingly, the PDP according to another embodiment of the present invention can improve driving characteristics by minimizing the difference in voltage characteristics between on-discharge cells and off-discharge cells, and also improve visual characteristics of a residual image.

As described above, the plasma display panel according to the present invention includes a partition wall having a width of about 200 μm, thereby minimizing the kinetic energy of the discharge charges moved to the adjacent discharge cells. Accordingly, the present invention can improve the driving characteristics by minimizing the difference in voltage characteristics between the on discharge cells and the off discharge cells, and also improve the visual characteristics of the residual image.                     

In addition, the present invention can minimize the kinetic energy of the discharge charge moved to the adjacent discharge cells by forming at least one slit on the upper surface of the partition wall. Accordingly, the present invention can improve the driving characteristics by minimizing the difference in voltage characteristics between the on discharge cells and the off discharge cells, and also improve the visual characteristics of the residual image.

In addition, the present invention can minimize the kinetic energy of the discharge charge moved to the adjacent discharge cells by forming at least one slit on the upper surface of the partition wall having a width of about 200㎛. Accordingly, the present invention can improve the driving characteristics by minimizing the difference in voltage characteristics between the on discharge cells and the off discharge cells, and also improve the visual characteristics of the residual image.

As a result, the present invention makes it possible to display the high quality image by making the driving characteristics between the discharge cells uniform and improving the afterimage visual effect.

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 (6)

A plurality of discharge cells having a sustain electrode pair including a scan / hold electrode and a common sustain electrode formed on the upper substrate, and an address electrode formed on the lower substrate, and arranged in a predetermined order; An upper dielectric layer formed on the upper substrate; A lower dielectric layer formed on the lower substrate; It is formed on the lower substrate, and provided with a plurality of partition walls for separating the respective discharge cells, The barrier ribs have a width between 100 μm and 500 μm. The method of claim 1, And at least one slit on an upper surface of the partition wall. The method of claim 2, The slit is formed smaller than the width of the upper surface of the partition wall, and has a depth smaller than the height of the partition wall. A plurality of discharge cells having a sustain electrode pair including a scan / hold electrode and a common sustain electrode formed on the upper substrate, and an address electrode formed on the lower substrate, and arranged in a predetermined order; An upper dielectric layer formed on the upper substrate; A lower dielectric layer formed on the lower substrate; A plurality of partition walls formed on the lower substrate to separate the discharge cells; At least one slit formed on the upper surface of each partition wall, The upper surface of the partition wall has a width between 100㎛ 500㎛ characterized in that the plasma display panel. The method of claim 4, wherein The slit is formed smaller than the width of the upper surface of the partition wall, and has a depth smaller than the height of the partition wall. delete

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