KR20030071203A - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel capable of increasing brightness and efficiency.

The plasma display panel according to the present invention includes a rectangular delta partition wall for separating red, green, and blue discharge spaces, and transparent electrodes facing each other on the long axis of the discharge space.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel capable of increasing brightness and 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.

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

Referring to FIG. 1, a discharge cell of a three-electrode alternating surface discharge PDP includes a pair of sustain electrodes formed on an upper substrate 10, that is, a scan / hold electrode 12Y and a common sustain electrode 12Z, and a lower substrate 18. Is provided on the address electrode 12X. Here, the sustain electrode pairs 12Y and 12Z are composed of a transparent electrode 12a and a 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, the fluorescent substance 20 emits light by ultraviolet rays generated during sustain discharge, so that visible light is emitted to the outside of the cell. As a result, the discharge cells adjust the period during which the discharge is maintained to implement gray scale, and the PDP in which the discharge cells are arranged in a matrix form displays an image.

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

In order to solve this problem, the delta-type partition structure 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 to improve luminance due to an increase in the coating area and reflectance of the phosphor, and each discharge cell is connected to a narrow channel 28 to facilitate exhaust or gas injection. Can be. 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 fabrication method or driving method is the same as the conventional one, it is possible to obtain 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.

The PDP includes an address electrode 30X, first and second bus electrodes 32Y and 32Z provided in a direction crossing the address electrode 30X, and a first transparent electrode extending from the first bus electrode 32Y. 34Y and the second transparent electrode 34Z extending from the second bus electrode 32Z. The first transparent electrode 34Y and the first bus electrode 32Y are used as the scan sustain electrode, and the second transparent electrode 34Z and the second bus electrode 32Z are used as the common sustain electrode.

The rectangular delta partition 42 has a plurality of first partitions 36 formed in parallel with the first bus electrode 32Y, and a second second partition formed parallel to the address electrode 30X between the first partitions 36. The partition 38 is provided.

As described above, one discharge cell is surrounded by a slope by the rectangular delta partition 42, so that the coating area of the phosphor is increased and the luminance is improved due to the increase in reflectance. In addition, the bulkhead fabrication method or driving method is the same as the conventional one, it is possible to obtain an increase in brightness and efficiency without additional processes.

However, the rectangular delta partition wall of the PDP of the conventional rectangular delta structure has a rectangular shape in which the horizontal length is larger than the vertical length. Accordingly, the transparent electrodes 34Y and 34Z are formed to be laterally long to correspond to the first partition walls 42, thereby shortening the distance between the transparent electrodes. That is, there is a problem that the brightness and efficiency are lowered compared to the case where the discharge length is short and the discharge length is long.

Accordingly, an object of the present invention relates to a plasma display panel capable of increasing brightness and efficiency.

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 plan view illustrating a plasma display panel according to a first exemplary embodiment of the present invention.

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

8 is a plan view illustrating a plasma display panel according to a third exemplary embodiment of the present invention.

9 is a plan view illustrating a plasma display panel according to a fourth embodiment of the present invention.

10 is a plan view illustrating a plasma display panel according to a fifth embodiment of the present invention.

11 is a plan view illustrating a plasma display panel according to a sixth embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

10: upper substrate 12X, 30X, 60X: address electrode

12Y: scanning holding electrode 12Z: common holding electrode

14,22 dielectric layer 16: protective film

18: lower substrate 20: phosphor

24, 42, 82: bulkhead 32Y, 32Z, 62Y, 62Z: bus electrode

34Y, 34Z, 64Y, 64Z: transparent electrode

In order to achieve the above object, the plasma display panel according to the present invention includes a rectangular delta partition wall for separating the red, green and blue discharge space, and transparent electrodes facing each other on the long axis of the discharge space.

The plasma display panel extends in a short axis direction of the rectangular delta partition wall, and has a bus electrode formed in parallel with the long axis direction.

The plasma display panel may further include an address electrode orthogonal to the bus electrode.

The transparent electrodes are formed to face each other with an address electrode therebetween.

The transparent electrode is in contact with the horizontal side and the vertical side of the rectangular delta partition wall.

The transparent electrodes are formed to be biased toward one side of the discharge space.

The transparent electrodes are characterized in that the surfaces facing each other are formed to be inclined.

Characterized in that forming a projection on the end of the transparent electrode.

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. 6 to 11.

6 is a diagram illustrating a plasma display panel according to a first embodiment of the present invention.

Referring to FIG. 6, the PDP according to the first embodiment of the present invention has a delta structure in which discharge cells positioned adjacent to each other up and down form one pixel. In other words, the PDP according to the first embodiment of the present invention includes an R subpixel and a B subpixel positioned in an nth line (n is a natural number of 1 or more), and a G positioned in an n + 1 or n-1 line. The subpixels form one pixel.

The PDP according to the first embodiment of the present invention includes a rectangular delta partition 82 having a plurality of first partitions 66 and second partitions 68 orthogonal to the first partitions 66. The second partition wall 68 is formed by a predetermined interval in pixel row units.

In addition, the PDP is formed along the address electrode 60X, the first partition walls 66, and extends into the second partition walls 68 to form the first and second bus electrodes 62Y and 62Z, and the second partition walls ( And first and second transparent electrodes 64Y and 64Z protruding from the first and second bus electrodes 62Y and 62Z extended to 68. Here, the first transparent electrode 64Y and the first bus electrode 62Y are used as the scan sustain electrode, and the second transparent electrode 64Z and the second bus electrode 62Z are used as the common sustain electrode.

As such, the first and second transparent electrodes 64Y and 64Z of the PDP according to the first embodiment of the present invention are formed to face each other with the address electrode 60X interposed on the long axis of the discharge space so that the discharge length is relative. Lengthens. The discharge length is long, so that the discharge is sufficiently formed, thereby improving brightness and efficiency.

However, the PDP according to the first embodiment of the present invention includes first and second transparent electrodes 64Y and 64Z formed at the center of the discharge space and first and second bus electrodes formed on the first partition 66. If the distance between (62Y, 62Z) is not large enough, discharge will occur between them. For example, when the distance between the first transparent electrode 64Y and the second bus electrode 62Z formed on the first partition wall 66 is not sufficiently secured, discharge occurs between them. Accordingly, the distribution of wall charges may be distorted, which makes driving difficult. In particular, PDP discharge cells for high quality have a small cell size, making it difficult to sufficiently secure the distance between the transparent electrodes 64Y and 64Z and the bus electrodes 62Y and 62Z, thereby causing a misdischarge.

7 is a diagram illustrating a PDP according to a second embodiment of the present invention.

Referring to FIG. 7, the PDP according to the second embodiment of the present invention has the same components except that the sustain electrode pairs are formed on both sides of the discharge cells as compared to the PDP shown in FIG. 5.

The first and second bus electrodes 62Y and 62Z of the PDP according to the second embodiment of the present invention are formed along the first partition wall 66 and extend a predetermined length to the second partition wall 68. Here, the lengths of the first and second bus electrodes 62Y and 62Z extending toward the second partition wall 68 are formed to be smaller than those according to the first embodiment of the present invention. In addition, the first and second transparent electrodes 64Y and 64Z protrude from the first and second bus electrodes 62Y and 62Z extending toward the second partition wall 68.

As described above, the PDP according to the second embodiment of the present invention has a distance between the first transparent electrode 64Y and the second bus electrode 62Z, and the second transparent electrode 64Z and the first bus electrode 62Y. It is relatively far away to block the discharge between the transparent electrode and the counter bus electrode. In addition, since the first and second transparent electrodes 64Y and 64Z are formed to face each other on the long axis of the discharge space, the discharge length is relatively long, thereby improving brightness and efficiency.

However, there is a problem in that the area of the first and second transparent electrodes 64Y and 64Z facing each other becomes small, thereby reducing the voltage margin.

8 is a plan view illustrating a plasma display panel according to a third exemplary embodiment of the present invention.

Referring to FIG. 8, the plasma display panel according to the third exemplary embodiment of the present invention is configured to “a” or “b” the first and second transparent electrodes 64Y and 64Z as compared to the plasma display panel shown in FIG. 6. The same components are provided except that they are formed in a shape.

The first and second bus electrodes 62Y and 62Z of the PDP according to the third exemplary embodiment of the present invention are formed along the first partition wall 66 and extend toward the second partition wall 68 by a predetermined length. The first and second transparent electrodes 64Y and 64Z protrude from the first and second bus electrodes 62Y and 62Z extending toward the second partition wall 68 and form protrusions 70 at the ends thereof.

As such, the protrusions 70 are formed at ends of the first and second transparent electrodes 64Y and 64Z of the PDP according to the third embodiment of the present invention to face the first and second transparent electrodes 64Y and 64Z. The viewing area can be relatively increased to increase the voltage margin, thereby lowering the driving voltage. In addition, since the distance between the transparent electrode and the relative bus electrode is relatively far, it is possible to block the discharge between the transparent electrode and the relative bus electrode. In addition, since the first and second transparent electrodes 64Y and 64Z are formed to face each other on the long axis of the discharge space, the discharge length is relatively long, thereby improving brightness and efficiency.

9 is a plan view illustrating a plasma display panel according to a fourth embodiment of the present invention.

Referring to FIG. 9, the plasma display panel according to the fourth embodiment of the present invention is formed to be inclined at one side of the first and second transparent electrodes 64Y and 64Z as compared to the plasma display panel shown in FIG. 6. Except that it has the same components.

The first and second bus electrodes 62Y and 62Z of the PDP according to the fourth exemplary embodiment of the present invention are formed to extend a predetermined length from the second partition 68 along the first partition 66. The first and second transparent electrodes 64Y and 64Z protrude from the first and second bus electrodes 62Y and 62Z extending toward the second partition wall 68, and the opposite surfaces are inclined.

As described above, the PDP according to the fourth embodiment of the present invention inclines the facing surfaces of the first and second transparent electrodes 64Y and 64Z. As a result, the area facing each other is relatively increased, thereby improving the driving voltage margin and lowering the driving voltage. In addition, since the distance between the transparent electrode and the relative bus electrode is relatively far, it is possible to block the discharge between the transparent electrode and the relative bus electrode. In addition, since the first and second transparent electrodes 64Y and 64Z are formed to face each other on the long axis of the discharge space, the discharge length is relatively long, thereby improving brightness and efficiency.

10 is a plan view illustrating a plasma display panel according to a fifth embodiment of the present invention.

Referring to FIG. 10, the plasma display panel according to the fifth exemplary embodiment of the present invention includes the same components except that the transparent electrode and the bus electrode are in contact with each other in comparison with the plasma display panel shown in FIG. 6. Equipped.

The first and second bus electrodes 62Y and 62Z of the PDP according to the third exemplary embodiment of the present invention extend along a first partition wall 66 to a predetermined length from the second partition wall 68. The first and second transparent electrodes 64Y and 64Z protrude from the first and second bus electrodes 62Y and 62Z in the directions of the first and second partitions 66 and 68.

As described above, in the PDP according to the fifth embodiment of the present invention, the portion where the transparent electrodes 64Y and 64Z and the bus electrodes 62Y and 62Z come into contact with each other can reduce the voltage drop of the transparent electrode. In addition, since the distance between the transparent electrode and the relative bus electrode is relatively far, it is possible to block the discharge between the transparent electrode and the relative bus electrode. In addition, since the first and second transparent electrodes 64Y and 64Z are formed to face each other on the long axis of the discharge space, the discharge length is relatively long, thereby improving brightness and efficiency. In addition, the area of the facing transparent electrode can be increased, thereby improving the voltage margin.

In the plasma display panel according to the first to fifth embodiments of the present invention, the discharge paths are relatively extended by forming transparent electrodes 64Y and 64Z in a center of the conventional discharge cell toward the square delta partition wall. In addition, a voltage is applied through the bus electrodes 62Y and 62Z which are formed to extend toward the second partition wall 68 so as to prevent mis-discharge between the transparent electrode and the counter bus electrode.

11 is a plan view illustrating a plasma display panel according to a sixth embodiment of the present invention.

Referring to FIG. 11, the plasma display panel according to the sixth embodiment of the present invention is configured to compare the first and second bus electrodes 62Y and 62Z with the first partition wall 66 in comparison with the plasma display panel shown in FIG. 6. The same components are provided except that they are correspondingly formed.

The first and second bus electrodes 62Y and 62Z of the PDP according to the sixth embodiment of the present invention are formed along the first partition wall 66. The first and second transparent electrodes 64Y and 64Z protrude from the first and second bus electrodes 62Y and 62Z. Here, the first and second transparent electrodes 64Y and 64Z are formed at one side of the discharge space to face in the diagonal direction.

As such, the PDP according to the sixth embodiment of the present invention receives a voltage through the bus electrodes 62Y and 62Z formed along the first partition wall 66. In addition, since the distance between the transparent electrode and the relative bus electrode is relatively far, it is possible to block the discharge between the transparent electrode and the relative bus electrode. In addition, since the first and second transparent electrodes 64Y and 64Z are formed to face each other on the long axis of the discharge space, the discharge length is relatively long, thereby improving brightness and efficiency.

As described above, the plasma display panel according to the present invention forms facing transparent electrodes on the long axis of the discharge space. As a result, the discharge length is increased, and the discharge efficiency and luminance can be increased. In addition, erroneous discharge can be prevented by forming the transparent electrode inclined toward the partition wall.

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 rectangular delta bulkhead for separating red, green and blue discharge spaces, And plasma electrodes facing each other on the long axis of the discharge space. The method of claim 1, And a bus electrode extending in a short axis direction of the rectangular delta bulkhead and formed in parallel with a long axis direction. The method of claim 2, And an address electrode orthogonal to the bus electrode. The method of claim 3, wherein And the transparent electrodes are formed to face each other with the address electrode therebetween. The method of claim 1, And the transparent electrode is in contact with the horizontal and vertical sides of the rectangular delta partition wall. The method of claim 1, And the transparent electrodes are formed to be biased toward one side of the discharge space. The method of claim 1, And the transparent electrodes are inclined to face each other. The method of claim 1, And a protrusion formed at an end of the transparent electrode.