KR20030074943A - Plasma display panel - Google Patents

Abstract

PURPOSE: A plasma display panel is provided to achieve improved discharge efficiency and luminance by arranging electrodes in a diagonal direction of discharge cell. CONSTITUTION: A plasma display panel comprises a scan/sustaining electrodes(60,62), a delta type barrier rib(66), and an address electrode(64). The scan/sustaining electrodes have transparent electrodes(60A,62A) arranged at corners of a discharge cell in such a manner that the transparent electrodes are opposed to each other in a diagonal direction in the discharge cell; and metal electrodes(60B,62B) corresponding to the delta type barrier rib, and which are formed at sides of the transparent electrodes so as to compensate resistance.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

The present invention relates to a plasma display panel, and more particularly to a plasma display panel that can improve the discharge efficiency and brightness.

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 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-formed barrier rib structure, the well-shaped barrier rib structure may increase the luminance due to the large coating area of the phosphor 20, but has a problem in that gas is not well vented.

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 square 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, as the resolution of the 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 the left and right, so that the first and second transparent electrodes 34Y and 34Z face in the direction orthogonal to the address electrode. Becomes shorter. As a result, the luminance decreases as the driving voltage increases.

Accordingly, an object of the present invention relates to a plasma display panel which can improve discharge efficiency and brightness by forming electrodes in a discharge cell diagonal direction.

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 plasma display panel according to a first embodiment of the present invention.

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

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

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

<Description of Symbols for Main Parts of Drawings>

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

12Y, 60, 70, 80, 90: scan electrode 12Z, 62, 72, 82, 92: sustain electrode

14,22 dielectric layer 16: protective film

18: lower substrate 20: phosphor

24,42,66: bulkhead

In order to achieve the above object, the plasma display panel according to the present invention comprises a sustain electrode pair and a delta-type partition wall formed for sustain discharge, each of the sustain electrode pair is a diagonal direction in the discharge cell It is characterized in that it comprises a transparent electrode formed on the corner of the discharge cell facing each other, and a metal electrode corresponding to the delta-type partition wall and formed on one side of the transparent electrode to compensate for the resistance.

The transparent electrode is characterized in that it is formed to alternate in the up / down direction of the metal electrode.

The transparent electrode is characterized in that the pentagon.

At least one side of the transparent electrode is characterized in that connected to the metal electrode.

At least one side of the transparent electrode is characterized in that the perpendicular to the metal electrode.

The transparent electrode is characterized in that the electrode area of the portion connected to the metal electrode is removed.

It is characterized in that it further comprises a protruding electrode protruding from the metal electrode to overlap with the delta-type partition wall and to be connected to the transparent electrode.

The transparent electrode is characterized in that the polygon pentagonal or more.

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 10.

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

Referring to FIG. 7, a PDP according to the present invention includes a pair of sustain electrodes 60 and 62 formed to face diagonally in a discharge cell, a delta partition 64 and an address electrode 60X.

The sustain electrode pairs 60 and 62 are composed of the scan electrode 60 and the sustain electrode 62. The scan signal for scanning the panel and the sustain signal for maintaining the discharge are mainly supplied to the scan electrode 60, and the sustain signal is mainly supplied to the sustain electrode 62.

Each of the scan and sustain electrodes 60 and 62 is formed of metal electrodes 60B and 62B having a narrow line width and transparent electrodes 60A and 62A formed up and down alternately around the metal electrodes 60B and 62B. Is done.

The transparent electrodes 60A and 62A are formed in a pentagonal shape. In this case, one side of the pentagon is formed in a direction parallel to the metal electrodes 60B and 62B, and at least one side of the remaining sides is formed in a direction perpendicular to the metal electrodes 60B and 62B. The transparent electrodes 60A and 62A are formed at corners of an arbitrary discharge cell such that the two transparent electrodes 60A and 62A formed in one discharge cell face each other in the diagonal direction of the discharge cell. In other words, when the charged particles move in the longitudinal direction, which is closer than the horizontal direction of the discharge cell during the plasma discharge, that is, the metal electrodes 60B and 62B, the distance of the discharge path is shortened and the discharge efficiency decreases. The distance of the discharge path becomes long by forming 60A, 62A) in the diagonal direction instead of the longitudinal direction. Accordingly, in the PDP according to the present invention, as the discharge length increases, the amount of charged particles generated during discharge increases, thereby improving discharge efficiency and achieving high brightness. In addition, since the discharge is generated in the diagonal direction, the amount of charged particles lost toward the delta partition 66 is reduced, so that the discharge efficiency is increased.

The transparent electrodes 60A and 62A are formed of a transparent conductive material having good light transmittance of 90% or more, for example, indium tin oxide. Since the transparent electrode material (ITO) has a large resistance value, it does not transmit power efficiently. Therefore, the resistive components of the transparent electrodes 60A and 62A are formed on the transparent electrodes 60A and 62A by forming metals 60B and 62B having a good conductivity, for example, silver (Ag) or copper (Cu). To compensate.

An upper dielectric layer and a protective film are stacked on an upper substrate (not shown) on which the sustain electrode pairs 60 and 62 are formed. The upper dielectric layer accumulates electric charges, and the protective layer prevents damage to the upper dielectric layer by sputtering, thereby increasing the lifetime of the PDP and increasing the emission efficiency of secondary electrons. Magnesium oxide (MgO) is usually used as a protective film.

On the lower substrate, which is not shown opposite to the upper substrate, an address electrode 64, a lower dielectric layer, which is not shown, a delta partition wall 66, and a phosphor which is not shown are formed.

The address electrode 64 is formed to overlap one side of the delta-shaped partition wall 66 in a direction crossing the sustain electrode pairs 60 and 62. As a result, the address electrode 64 is formed in the center and one side in any one discharge cell. The address electrode 64 is supplied with an address voltage for address discharge.

The lower dielectric layer, like the upper dielectric layer, accumulates charges during plasma discharge.

The delta partition 66 is formed in parallel with the address electrode 64 to prevent the ultraviolet rays generated by the discharge from leaking to the adjacent cells. The phosphor is applied to the surface of the lower dielectric layer and the delta partition 66 to emit visible light of any one of red, green or blue. Then, an inert gas for gas discharge is injected into the discharge space therein.

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

Referring to FIG. 8, the PDP according to the present invention includes sustain electrode pairs 70 and 72 that are formed to face diagonally in the discharge cell and have reduced electrode areas connected to the metal electrodes 70B and 72B.

Hereinafter, the description of the same components as in the first embodiment of the present invention will be omitted.

The sustain electrode pairs 70 and 72 include a scan electrode 70 and a sustain electrode 72. The scan signal for panel scanning and the sustain signal for sustaining discharge are mainly supplied to the scan electrode 70, and the sustain signal is mainly supplied to the sustain electrode 72.

Each of the scan and sustain electrodes 70 and 72 is formed of metal electrodes 70B and 72B having a narrow line width and transparent electrodes 70A and 72A formed up and down alternately around the metal electrodes 70B and 72B. Is done.

The transparent electrodes 70A and 72A are formed in a pentagonal shape. In this pentagon, one side is formed in a direction parallel to the metal electrodes 70B and 72B, and at least one side of the remaining sides is formed in a direction perpendicular to the metal electrodes 70B and 72B. In the form of the transparent electrodes 70A and 72A, the removal unit 72 removes the transparent electrodes 70A and 72A formed on one side of the metal electrodes 70B and 72B. As the electrode areas of the transparent electrodes 70A and 72A are reduced, the current flowing while the luminance of emitting light does not change is reduced, thereby improving the discharge efficiency.

The transparent electrodes 70A and 72A are formed at corners of an arbitrary discharge cell such that the two transparent electrodes 70A and 72A formed in one discharge cell face each other in the diagonal direction of the discharge cell. In other words, when the charged particles move in the longitudinal direction closer to the distance of the discharge cell in the plasma discharge direction, that is, the metal electrodes 70B and 72B, the distance of the discharge path is shortened and the discharge efficiency decreases. By forming the 70A, 72A) in the diagonal direction rather than the longitudinal direction, the distance of the discharge path becomes longer. Accordingly, in the PDP according to the present invention, as the discharge length increases, the amount of charged particles generated during discharge increases, thereby improving discharge efficiency and achieving high brightness. In addition, since the discharge is generated in the diagonal direction, the amount of charged particles lost toward the delta partition 66 is reduced, so that the discharge efficiency is increased.

The transparent electrodes 70A and 72A are made of a transparent conductive material having good light transmittance of 90% or more, for example, indium tin oxide. Since the transparent electrode material (ITO) has a large resistance value, it does not transmit power efficiently. Therefore, the resistive components of the transparent electrodes 70A and 72A are formed on the transparent electrodes 70A and 72A by forming metal electrodes 70B and 72B made of a good conductive material, for example, silver (Ag) or copper (Cu). To compensate.

The address electrode 64 is formed to overlap one side of the delta-shaped partition wall 66 in a direction crossing the sustain electrode pairs 60 and 62. As a result, the address electrode 64 is formed in the center and one side in any one discharge cell. The address electrode 64 is supplied with an address voltage for address discharge.

The delta partition 66 is formed in parallel with the address electrode 64 to prevent the ultraviolet rays generated by the discharge from leaking to the adjacent cells.

9 is a diagram illustrating a PDP according to a third embodiment of the present invention.

Referring to FIG. 9, the sustain electrode pairs 80 and 82 of the PDP according to the present invention may include transparent electrodes 80A and 82A, metal electrodes 80C and 82C, which are formed to face diagonally in discharge cells. Protruding electrodes 80B and 82B protruding from the metal electrodes 80C and 82C are connected to the sustain electrode pairs 70A and 70B.

Hereinafter, the description of the same components as in the first embodiment of the present invention will be omitted.

The sustain electrode pairs 80 and 82 are composed of the scan electrode 80 and the sustain electrode 82. The scan signal for scanning the panel and the sustain signal for maintaining the discharge are mainly supplied to the scan electrode 80, and the sustain signal is mainly supplied to the sustain electrode 82.

The transparent electrodes 80A and 82A are alternately formed up and down around the metal electrodes 80C and 82C. The transparent electrodes 80A and 82A are formed in a pentagonal shape. In this pentagon, one side is formed in a direction parallel to the metal electrodes 80C and 82C, and at least one side of the remaining sides is formed in a direction perpendicular to the metal electrodes 80C and 82C. In the form of the transparent electrodes 80A and 82A, the transparent electrodes 80A and 82C have a removal unit 85 from which the transparent electrodes 80A and 82A formed on one side thereof are removed. As the electrode areas of the transparent electrodes 80A and 82A are reduced by the removal unit 85, the current flowing without decreasing the luminance of light emitted is reduced, thereby improving discharge efficiency.

The transparent electrodes 80A and 82A are formed at corners of an arbitrary discharge cell such that the two transparent electrodes 80A and 82A formed in one discharge cell face each other in the diagonal direction of the discharge cell. In other words, when the charged particles move in the longitudinal direction closer to the distance of the discharge cell in the plasma discharge direction, that is, the metal electrodes 80C and 82C, the distance of the discharge path is shortened and the discharge efficiency decreases. By forming 80A and 82A in the diagonal direction rather than the vertical direction, the distance of the discharge path becomes longer. Accordingly, in the PDP according to the present invention, as the discharge length increases, the amount of charged particles generated during discharge increases, thereby improving discharge efficiency and achieving high brightness. In addition, since the discharge is generated in the diagonal direction, the amount of charged particles lost toward the delta partition 66 is reduced, so that the discharge efficiency is increased.

The transparent electrodes 80A and 82A are formed of a transparent conductive material having good light transmittance of 90% or more, for example, indium tin oxide. Since the transparent electrode material (ITO) has a large resistance value, it does not transmit power efficiently. Accordingly, the resistive components of the transparent electrodes 80A and 82A are formed on the transparent electrodes 80A and 82A by forming metals 80C and 82C having a good conductivity, for example, silver (Ag) or copper (Cu). To compensate.

The protruding electrodes 80B and 82B protrude from one side of the metal electrodes 80C and 82C overlapping the delta-shaped partition wall 66 and are connected to the transparent electrodes 80A and 82A alternately formed up and down. The protruding electrodes 80B and 82B are formed in a vertical direction parallel to the address electrode 64 in the discharge cell to reduce the voltage drop caused by the resistance of the transparent electrodes 80A and 82A. When only the transparent electrodes 80A and 82A having a relatively large resistance component are formed, the discharge is actively generated in the longitudinal direction of the metal electrodes 80C and 82C, so that the protruding electrodes 80B and 82B are used to actively discharge in the horizontal direction. It is formed in the longitudinal direction.

The address electrode 64 is formed to overlap one side of the delta-shaped partition wall 66 in a direction crossing the sustain electrode pairs 60 and 62. As a result, the address electrode 64 is formed in the center and one side in any one discharge cell. The address electrode 64 is supplied with an address voltage for address discharge.

The delta partition 66 is formed in parallel with the address electrode 64 to prevent the ultraviolet rays generated by the discharge from leaking to the adjacent cells.

10 is a diagram illustrating a PDP according to a fourth embodiment of the present invention.

Referring to FIG. 10, the PDP according to the present invention includes the sustain electrode pairs 60 and 62 formed to face in a diagonal direction in the discharge cell and have a polygonal shape.

Hereinafter, the description of the same components as in the first embodiment of the present invention will be omitted.

The sustain electrode pairs 90 and 92 are composed of the scan electrode 90 and the sustain electrode 92. The scan signal for scanning the panel and the sustain signal for maintaining the discharge are mainly supplied to the scan electrode 90, and the sustain signal is mainly supplied to the sustain electrode 92.

Each of the scan and sustain electrodes 90 and 92 is formed of metal electrodes 90B and 92B having a narrow line width and transparent electrodes 90A and 92A formed up and down alternately around the metal electrodes 90B and 92B. Is done.

The transparent electrodes 90A and 92A are formed in a polygonal shape having a pentagonal shape or more. In this case, one side of the polygon is formed in a direction parallel to the metal electrodes 90B and 92B, and at least one side of the remaining sides is formed in a direction perpendicular to the metal electrodes 90B and 92B. The transparent electrodes 90A and 92A are formed at corners of an arbitrary discharge cell so that the two transparent electrodes 90A and 92A formed in one discharge cell face each other in the diagonal direction of the discharge cell. In other words, when the charged particles move in the longitudinal direction closer to the distance of the discharge cell in the plasma discharge direction, that is, the metal electrodes 90B and 92B, the distance of the discharge path is shortened and the discharge efficiency decreases. By forming the 90A, 92A in the diagonal direction rather than the longitudinal direction, the distance of the discharge path becomes longer. Accordingly, in the PDP according to the present invention, as the discharge length increases, the amount of charged particles generated during discharge increases, thereby improving discharge efficiency and achieving high brightness. In addition, since the discharge is generated in the diagonal direction, the amount of charged particles lost toward the delta partition 66 is reduced, so that the discharge efficiency is increased.

The transparent electrodes 90A and 92A are formed of a transparent conductive material having good light transmittance of 90% or more, for example, indium tin oxide. Since the transparent electrode material (ITO) has a large resistance value, it does not transmit power efficiently. Therefore, the resistive components of the transparent electrodes 90A and 92A are formed on the transparent electrodes 90A and 92A by forming metals 90B and 62B having a good conductivity, for example, silver (Ag) or copper (Cu). To compensate.

The address electrode 64 is formed to overlap one side of the delta-type partition wall 66 in a direction crossing the sustain electrode pairs 90 and 92. As a result, the address electrode 64 is formed in the center and one side in any one discharge cell. The address electrode 64 is supplied with an address voltage for address discharge.

The delta partition 66 is formed in parallel with the address electrode 64 to prevent the ultraviolet rays generated by the discharge from leaking to the adjacent cells.

As described above, the PDP according to the present invention includes a sustain electrode pair having a pentagonal shape and having transparent electrodes formed to face each other in a diagonal direction in the discharge cell. In the PDP according to the present invention, since the transparent electrode is formed in a diagonal direction as compared with the prior art, the distance of the discharge path is increased during discharge, thereby forming more charged particles than in the prior art. Accordingly, the discharge efficiency of the PDP can be improved and high brightness can be achieved. In addition, in the PDP according to the present invention, as the discharge occurs in the diagonal direction, the amount of charged particles lost in the delta-type partition wall decreases, thereby increasing the discharge efficiency. In addition, the PDP according to the present invention can reduce the electrode area can reduce the current consumed.

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 (9)

In the plasma display panel comprising a sustain electrode pair and a delta-type partition wall formed for sustain discharge, Each of the sustain electrode pairs includes a transparent electrode formed at a corner of the discharge cell so as to face each other in a diagonal direction within the discharge cell; And a metal electrode corresponding to the delta-type partition wall and formed on one side of the transparent electrode to compensate for resistance. The method of claim 1, And the transparent electrode is alternately formed in an up / down direction of the metal electrode. The method of claim 1, And said transparent electrode is pentagonal. The method of claim 3, wherein And at least one side of the transparent electrode is connected in parallel with the metal electrode. The method of claim 3, wherein At least one side of the transparent electrode is perpendicular to the metal electrode. The method of claim 4, wherein And the electrode area of the transparent electrode is removed from the area connected to the metal electrode. The method according to any one of claims 1 to 6, And a protruding electrode protruding from the metal electrode so as to overlap the delta-type partition wall and to be connected to the transparent electrode. The method of claim 1, And said transparent electrode is a pentagon or more polygon. The method of claim 1, And an address electrode formed to overlap one side of the delta-type partition wall.