KR20040007113A - Plasma display panel - Google Patents

Abstract

PURPOSE: A plasma display panel is provided to prevent a cross talk between an upper discharge cell and a lower discharge cell and achieve a high contrast and efficiency by changing a shape of a pair of sustain electrodes. CONSTITUTION: A plasma display panel comprises a pair of sustain electrodes(69a,69b) formed in each discharge cell in parallel. An electrode area of a surface facing an upper and a lower cells of the discharge is smaller than that of a surface facing each other in the sustain electrodes. The sustain electrodes include a projection formed on each discharge cell.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having high efficiency and high brightness by changing the shape of the sustain electrode pair.

Plasma Display Panels (hereinafter referred to as 'PDPs') typically display characters or graphics by emitting phosphors by 147 nm ultraviolet rays generated during gas discharge such as He + Xe, Ne + Xe, He + Ne + Xe. The included image is displayed. Such PDPs are attracting attention as large-area flat panel displays due to their ease of thinning and large size, as well as expanding the market with the recent commercial production of companies.

1 and 2, a structure of a PDP of a three-electrode alternating current (AC) type which is commonly used is shown.

Referring to FIG. 1, the upper and lower glass substrates 1 and 2 are arranged in parallel at regular intervals. The mixed gas is injected into the discharge space between the upper and lower glass substrates 1 and 2. The phosphor 5 that emits light upon discharge of the mixed gas is applied onto the lower glass substrate 2. An upper dielectric layer 6 and a protective layer 7 are stacked on the upper glass substrate 1, and a sustain electrode in which a metal bus electrode 9b is bonded in the longitudinal direction between the upper glass substrate 1 and the upper dielectric layer 6. The pairs Y and Z are arranged side by side in the direction orthogonal to the address electrode X. The lower dielectric layer 4 is stacked on the lower glass substrate 2, and the address electrode X is disposed therebetween. On the lower dielectric layer 4, the partition 3 is extended with the address electrode X interposed therebetween.

The address electrode X formed on the lower glass substrate 2 generates an address discharge when a voltage is applied to one of the address electrode X and the sustain electrode pairs Y and Z to select a discharge cell.

The partition 3 formed on the address electrode X blocks electrical and optical interference between cells and provides a discharge space together with the upper and lower glass substrates 1 and 2 inside the discharge cell.

The phosphor 5 coated on the partition wall 3 is excited by a vacuum ultraviolet ray (Vacuum Ultraviolet: VUV) generated at the time of discharge to generate visible light having a unique color, so that the three primary colors of light are discharged in each discharge cell. Green and blue (R, G, B) are displayed.

The upper and lower dielectric layers 6 and 4 serve to accumulate charge during discharge. The protective layer 7 serves to protect the upper dielectric layer 6 from sputtering of plasma particles during discharge, and is mainly made of magnesium oxide (MgO).

The sustain electrode pairs Y and Z maintain a discharge by applying a sustain voltage to the sustain electrode pairs Y and Z following the address discharge. The transparent electrode 9a constituting each of the sustain electrode pairs Y and Z is formed of a transparent conductive material (eg, Indium-Tin-Oxide; ITO) to emit light from the phosphor 5. It does not interfere with visible light. However, since the transparent electrode 9a is made of a conductive material having a high resistance, the conductivity is low. The transparent electrode 9a having a large resistance causes a voltage difference between the sustain electrode pairs Y and Z and generates heat when the sustain electrode pairs Y and Z are discharged. This causes a difference in discharge amount for each discharge cell, thereby causing a difference in luminance of the panel and lowering the uniformity of the panel such as raising the temperature of the panel. As a result, as shown in FIG. 2, the metal bus electrode 9b is bonded to the transparent electrode 9a having low conductivity, and the metal bus electrode 9b reduces the resistance of the sustain electrode pairs Y and Z to reduce the panel. It improves the uniformity of.

The sustain electrode pairs Y and Z are formed to have a predetermined width for each discharge cell in consideration of the luminance and uniformity of the panel. At this time, the width of the sustain electrode pairs (Y, Z) can be changed according to the shape of the partition wall 3 forming the discharge cell, and the longer the width of the sustain electrode pairs (Y, Z) in the discharge cell is sustained. When discharged, the amount of vacuum ultraviolet rays emitted from the mixed gas near the anode (+) electrode increases to obtain sufficient luminance, and the efficiency of the PDP also increases.

The partition structure currently used is divided into a straight stripe type partition as shown in FIG. 3 and a grid-type partition having a wall between the partitions as shown in FIG. 4. .

Referring to FIG. 3, since the PDP employing the stripe-type partition wall has a structure in which upper and lower discharge cells 38a and 38b are connected, air flow paths exist. This flow path facilitates the exhaust of the air and the injection of the gas when an exhaust process is performed in which the discharge space is vacuumed for the injection of the mixed gas. In addition, the PDP employing the stripe-type partition wall has an advantage of easy manufacturing because the pattern of the partition wall is simple. On the other hand, in the PDP employing the stripe-type partition wall, since there is a flow path, the mixed gas flows during discharge to excite the phosphors in the adjacent up and down discharge cells to emit light. That is, a PDP employing a stripe-type barrier rib has a disadvantage in that crosstalk is generated, which causes color interference between up and down discharge cells. In order to solve the crosstalk between the vertical discharge cells, sustain electrode pairs Y31 and Z31 having a short width are formed in the PDP employing the stripe-type partition wall. As a result, the luminance characteristics of the PDP employing the stripe-type barrier ribs are relatively lowered.

As described above, in the PDP employing the stripe-type partition wall, the interval 34 in which the sustain electrode pairs Y31 and Z31 are disposed is adjusted in consideration of the crosstalk generated between the upper and lower discharge cells. As shown in FIG. 3, in the discharge cell of the VGA class PDP, sustain is prevented between the sustain electrode Z31 formed in the upper discharge cell 38a and the scan electrode Y32 formed in the lower discharge cell 38b. The electrode Z31 and the scan electrode Y32 are formed with an electrode gap 34 of about several hundred micrometers, for example, about 400 micrometers or more in the VGA class. As described above, in the PDP employing the stripe-type partition wall, the electrode gap 34 should be kept constant regardless of the size of the discharge cell due to the crosstalk problem between the upper and lower discharge cells 38a and 38b. As a result, in the present trend, it is necessary to reduce the discharge cell size in order to produce a PDP having a higher resolution than the VGA class PDP or the XGA class PDP. The width of the pair becomes relatively short. Since the electrode spacing 34 reduces the ratio of the electrode area to the discharge cell area, it does not improve the luminance and efficiency characteristics of the PDP employing the stripe-type partition wall as desired.

In order to prevent crosstalk between the upper and lower discharge cells and to improve luminance characteristics, a grid type barrier rib structure may be used as illustrated in FIG. 4. Referring to FIG. 4, since the PDP employing the grid-type partition wall has a structure in which the upper and lower discharge cells 38a and 38b are separated by the partition 35 formed between the partition walls 33, there is no air flow path. As a result, the PDP employing the lattice-type barrier ribs does not generate crosstalk, and thus, the sustain electrode pairs Y31 and Z31 can be formed independently. Thus, the PDP exhibits high brightness and high efficiency. On the other hand, the lattice type barrier ribs form a separate space for each discharge cell by blocking the barrier ribs, so when the exhaust process is performed to make the discharge cells in a vacuum state for the injection of mixed gas, there is no gas flow path so that air is discharged and Injection is difficult.

Therefore, it is possible to secure the ease of gas injection, which is an advantage of the PDP employing the stripe-type barrier ribs, and the ease of fabrication due to the simplicity of the barrier rib pattern. It is necessary to develop a PDP that can have high brightness and high efficiency by increasing the width of an electrode pair.

Accordingly, an object of the present invention is to provide a plasma display panel in which crosstalk is prevented by changing the shape of the sustain electrode pair, and also has high efficiency and high brightness.

1 is a perspective view showing a conventional AC surface discharge plasma display panel.

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

3 is a plan view illustrating a plasma display panel having a stripe-type partition wall in the related art.

4 is a plan view illustrating a plasma display panel having a conventional grid type partition wall.

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

6 is a plan view illustrating a sustain electrode pair according to a first embodiment of the present invention.

7A and 7B are graphs showing the correlation between the width of each electrode constituting the sustain electrode pair and the amount of vacuum ultraviolet radiation emitted.

8 is a plan view illustrating a sustain electrode pair according to a second embodiment of the present invention.

9 is a plan view illustrating a sustain electrode pair according to a third embodiment of the present invention.

<Brief description of symbols for the main parts of the drawings>

1, 61: upper glass substrate 2, 62: lower glass substrate

3, 63: partition 4, 64: lower dielectric layer

5, 65 phosphor 6, 66 upper dielectric layer

7, 67: protective layer 9,69,89: sustain electrode pair

9a, 69a, 89a: transparent electrodes 9b, 69b, 89b: metal bus electrodes

34: electrode spacing 38a, 38b, 38c, 78a, 78b, 78c: discharge space

68: electrode spacing X, X1: address electrode

Y, Y1, Y61, Y62, Y81, Y82, Y91, Y92: scan electrode

Z, Z1, Z61, Z62, Z81, Z82, Z91, Z92: Sustain electrode

In order to achieve the above object, the sustain electrode pair of the plasma display panel according to the present invention is characterized in that the electrode area of the surface facing the upper and lower cells of the discharge cell is smaller than the surface facing each other.

In the plasma display panel according to the present invention, each of the sustain electrode pairs has protrusions formed for each discharge cell, and the protrusions have smaller electrode areas formed on the side facing the upper and lower cells of the discharge cell than the surfaces of the sustain electrode pairs facing each other. Characterized in that to be formed.

In the plasma display panel according to the present invention, the protrusions formed on the surface facing the sustain electrode pair and the surface facing the upper and lower cells are characterized in that each has a trapezoidal shape having a different base size.

In the plasma display panel according to the present invention, the protrusions formed on the opposing surfaces of the sustain electrode pairs are formed in a quadrangular shape, and the protrusions formed on the opposing surfaces of the upper and lower cells have a hexagonal structure in which both corners of the upper and lower cells are cut off. It features.

In the plasma display panel according to the present invention, a protrusion formed on a surface facing the upper and lower cells without a protrusion on the opposite surface of the sustain electrode pair is characterized by a hexagonal structure in which the quadrangular edges of the vertical cell are cut off.

Other objects and advantages of the present invention in addition to the above object will be apparent from the description of the preferred embodiment of the present invention with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 5 to 9.

5 schematically illustrates a side view of a PDP according to an embodiment of the present invention.

Referring to FIG. 5, in the three-electrode AC surface discharge type PDP according to the present invention, upper and lower glass substrates 61 and 62 are arranged in parallel at regular intervals. Mixed gas is injected into the discharge space provided between the upper and lower glass substrates 61 and 62. The phosphor 65 emitted by the discharge of the mixed gas is applied onto the lower glass substrate 62. An upper dielectric layer 66 and a protective layer 67 are stacked on the upper glass substrate 61, and a sustain electrode to which a metal bus electrode 69b is bonded in the longitudinal direction between the upper glass substrate 61 and the upper dielectric layer 66. The pairs Y1 and Z1 are arranged side by side in the direction orthogonal to the address electrode X1. The lower dielectric layer 64 is stacked on the lower glass substrate 62, and the address electrode X1 is disposed therebetween. On the lower dielectric layer 64, the partition 63 is extended between the address electrodes X1.

The phosphor 65 is excited by a vacuum ultraviolet ray (VUV) having a short wavelength generated during discharge to generate a visible ray of intrinsic color, thereby causing red, green, blue (R, G, Will be displayed.

The upper and lower dielectric layers 64 and 66 serve to accumulate charge during discharge. The protective layer 67 serves to protect the dielectric layer 66 from sputtering of plasma particles during discharge, and is mainly made of magnesium oxide (MgO).

The sustain electrode pair 69 maintains the discharge by applying a sustain voltage to the sustain electrode pair 69 following the address discharge. The transparent electrodes 69a constituting each of the sustain electrode pairs Y1 and Z1 are formed of a transparent conductive material (eg, ITO) so as not to interfere with the visible light emitted from the phosphor 65. The metal bus electrode 69b bonded to each of the sustain electrode pairs 69 is formed of a transparent electrode (ITO) having low conductivity, and each of the sustain electrode pairs 69 reduces the uniformity of the panel during discharge. 69) to reduce the resistance.

In the lower glass substrate 62, when a voltage is applied to one of the address electrode X1 and the sustain electrode pairs Y1 and Z1, the address electrode X1 causes an address discharge to select a discharge cell.

The partition wall 63 blocks electrical and optical interference between the discharge cells and provides a discharge space together with the upper and lower glass substrates 61 and 62 inside the discharge cell.

From the foregoing, it can be seen that the PDP according to the present invention is the same in the laminated structure as the conventional three-electrode AC surface discharge type PDP. In fact, the PDP according to the present invention can be manufactured according to the conventional manufacturing process by modifying the pattern of the mask for manufacturing the sustain electrode pair without additional processing.

6 is a schematic plan view of a PDP according to a first embodiment of the present invention.

In the PDP according to the first embodiment of the present invention, each of the sustain electrode pairs Y61 and Z61 protrudes at the discharge cell 78a cycle, and the protrusion 75 becomes narrower toward the edge of the discharge cell 78a so that both sides of the protrusion are narrowed. 76 is provided with the inclined transparent electrode 69a and the metal bus electrode 69b formed in the center of the upper part of the transparent electrode 69a.

The inclined both sides 76 of the transparent electrode 69a are inclined with respect to the partition 63 at a predetermined inclination angle (for example, an angle between 2 and 30 ° with respect to the partition). In the transparent electrode 69a having the protrusion having the inclined both sides 76, the transparent electrode 69a is not formed near the partition 63. As a result, the PDP employing such an electrode prevents the discharge in the vicinity of the partition 63 and minimizes the discharge consumed by the partition 63. As described above, each of the sustain electrode pairs Y61 and Z61 employing the transparent electrode 69a having the inclined both sides 76 is consumed by the partition 63 by removing the transparent electrode near the partition 63. By suppressing inefficient discharge, the power consumption of the PDP is reduced.

In the transparent electrode 69a, the width 75 of which narrows toward the edge of the discharge cell 78a, the probability of occurrence of discharge between the sustain electrode Z61 and the scan electrode Y62 between the upper and lower discharge cells 78a and 78b. Will be reduced. As a result, the generation of crosstalk between the upper and lower discharge cells 78a and 78b is blocked.

As such, when the horizontal length 75 of the transparent electrode 69a facing each other between the upper and lower discharge cells 78a and 78b is narrowed to prevent discharge between the upper and lower discharge cells 78a and 78b, crosstalk is prevented from occurring. Therefore, the sustain electrode pairs Y61, Z61, Y62, and Z62 can be formed to have a narrower electrode gap 68, for example, about 150 µm in the case of VGA class. As a result, the PDP according to the first embodiment of the present invention is required to reduce the discharge cell size in order to produce a PDP having a resolution higher than or higher than a VGA-level PDP. The short sustain electrodes pairs Y61, Z61, Y62 and Z62 are employed to facilitate the manufacture of high resolution PDPs.

In addition, the PDP according to the first embodiment of the present invention employs sustain electrode pairs Y61 and Z61 to prevent crosstalk, so that the vertical length of the transparent electrode 69a is longer in one discharge cell 78a. It can be formed. The long vertical transparent electrode 69a will be referred to as a long electrode. As such, when the long electric rod 69a is formed in one discharge cell 78a, the amount of vacuum ultraviolet rays emitted from the mixed gas near the anode (+) electrode during sustain discharge increases to obtain sufficient luminance. In addition, the efficiency of the PDP is also increased.

This will be described in detail with reference to FIG. 7. The amount of excitation of the mixed gas according to the position (X-axis) of the transparent electrode located in the discharge cell during the discharge of the sustain electrode pairs Y61 and Z61 (Y-axis) ) Is shown in FIG. 7.

The transparent electrode employed in the PDP according to the prior art has a short vertical length as shown in Fig. 7a). Accordingly, the amount of excitation of the mixed gas in the discharge cell to emit vacuum ultraviolet rays according to the positions of the transparent electrode corresponding to the cathode (Cathod) and the positive electrode corresponding to the anode during discharge of the sustain electrode pair is changed. Done. In other words, the maximum amount of vacuum ultraviolet rays is emitted in the region where the center of the transparent electrode corresponding to the cathode is located, and the amount of vacuum ultraviolet rays decreases rapidly toward the anode. In numerical description, the amount of vacuum ultraviolet rays emitted from the transparent electrode of the anode in the PDP according to the prior art is only 30% of the total amount.

On the other hand, the transparent electrode employed in the PDP according to the first embodiment of the present invention is a long electric rod formed with a long vertical length as shown in FIG. Accordingly, the amount of excitation of the mixed gas in the discharge cell to emit vacuum ultraviolet rays according to the positions of the transparent electrode corresponding to the cathode (Cathod) and the positive electrode corresponding to the anode during discharge of the sustain electrode pair is changed. In the region between the transparent electrode corresponding to the cathode and the transparent electrode corresponding to the anode, the maximum amount of vacuum ultraviolet rays is emitted and the amount of vacuum ultraviolet rays emitted from the anode is also significantly increased. To describe this numerically, the amount of vacuum ultraviolet rays emitted from the transparent electrode of the positive electrode in the PDP according to the first embodiment of the present invention corresponds to 40% of the total amount, the total amount of vacuum ultraviolet radiation than the PDP according to the prior art It will increase greatly.

Therefore, the sustain electrode pair (Y61, Z61) of the PDP according to the first embodiment of the present invention increases the amount of vacuum ultraviolet radiation is greatly increased compared to the conventional by adopting a long electric rod, so as to consume the conventional power consumption, Since the luminance characteristic is greatly improved, the efficiency characteristic is also greatly improved.

Furthermore, since the metal bus electrode 69b formed on the transparent electrode 69a is positioned at the center of the transparent electrode 69a, a uniform voltage can be transmitted to the entire transparent electrode 69a. As a result, the PDP according to the first embodiment of the present invention efficiently consumes power.

Accordingly, since the PDP according to the first embodiment of the present invention employs a stripe-type partition wall, the sustain electrode Z61 is formed between the upper and lower discharge cells 78a and 78b while ensuring ease of gas injection / ejection and ease of fabrication. By forming the narrow opposing surface 75 of the transparent electrode 69a of the scan electrode Y62, it is possible to prevent crosstalk of the PDP and to reduce power consumption, thereby to have high brightness characteristics and high efficiency characteristics.

8 is a schematic plan view of a PDP according to a second embodiment of the present invention.

In the PDP according to the second embodiment of the present invention, each of the sustain electrode pairs Y81 and Z81 protrudes in the discharge cell 78a cycle, and the protrusion 85 becomes narrower toward the edge of the discharge cell 78a so that the width 85 becomes narrower. Both side walls 86 have an inclined transparent electrode 89a and a metal bus electrode 89b formed at the center of the transparent electrode 89a.

The inclined both sides 86 at the edge of the transparent electrode 89a are inclined with respect to the partition 63 at a predetermined inclination angle (for example, an angle between 2 and 30 ° with respect to the partition). In the transparent electrode 89a having the protrusion having the inclined both sides 86 at the edge, the transparent electrode 89a is not formed near the partition 63. As a result, the PDP employing such an electrode prevents the discharge in the vicinity of the partition 63 and minimizes the discharge consumed by the partition 63. As described above, each of the sustain electrode pairs Y81 and Z81 employing the transparent electrodes 89a having the side edges 86 with the inclined edges is removed from the partition 63 by removing the transparent electrode near the partition 63. By suppressing the inefficient discharge consumed to reduce the power consumption of the PDP. In addition, since the distance between the partition 63 and the side opposite to the partition 63 is constant, the transparent electrode 89a of the PDP according to the second embodiment of the present invention is caused by the sputtering concentration during discharge of the transparent electrode 89a. The wear phenomenon of the partition 63 and the phosphor (not shown) is reduced compared to the transparent electrode 79a of the PDP according to the first embodiment of the present invention.

The transparent electrode 89a, whose horizontal length 85 is narrowed toward the edge of the discharge cell 78a, has a probability of occurrence of discharge between the sustain electrode Z81 and the scan electrode Y82 between the upper and lower discharge cells 78a and 78b. Will be reduced. As a result, the occurrence of crosstalk between the upper and lower discharge cells 78a and 78b is blocked.

As described above, when the horizontal length 85 of the transparent electrode 89a facing each other between the upper and lower discharge cells 78a and 78b is narrowed to prevent discharge between the upper and lower discharge cells 78a and 78b, crosstalk is prevented from occurring. Therefore, the sustain electrode pairs Y81, Z81, Y82, and Z82 can be formed with a narrower electrode gap 68, for example, about 150 µm in the case of VGA class. As a result, the PDP according to the second embodiment of the present invention is required to reduce the discharge cell size in order to produce a PDP having a higher resolution than VGA-class PDP to XGA-class PDP. The short sustain electrodes pairs Y81, Z81, Y82, and Z82 are employed to facilitate the manufacture of high resolution PDPs.

In addition, since the PDP according to the second embodiment of the present invention employs the sustain electrode pairs Y81 and Z81 to prevent crosstalk, the vertical length of the transparent electrode 89a is longer in one discharge cell 78a. It can be formed. The long vertical transparent electrode 89a will be referred to as a long electrode. As such, when the long electric rod 89a is formed in one discharge cell 78a, the amount of vacuum ultraviolet rays emitted from the mixed gas near the anode (+ electrode) during sustain discharge increases to obtain sufficient luminance. In addition, the efficiency of the PDP is also increased.

This will be described in detail with reference to FIG. 7. The amount of excitation of the mixed gas according to the position (X axis) of the transparent electrode located in the discharge cell during the discharge of the sustain electrode pairs Y81 and Z81 (Y axis) ) Is shown in FIG. 7.

The transparent electrode employed in the PDP according to the prior art has a short vertical length as shown in Fig. 7a). Accordingly, the amount of excitation of the mixed gas in the discharge cell to emit vacuum ultraviolet rays according to the positions of the transparent electrode corresponding to the cathode (Cathod) and the positive electrode corresponding to the anode during discharge of the sustain electrode pair is changed. Done. In other words, the maximum amount of vacuum ultraviolet rays is emitted in the region where the center of the transparent electrode corresponding to the cathode is located, and the amount of vacuum ultraviolet rays decreases rapidly toward the anode. In numerical description, the amount of vacuum ultraviolet rays emitted from the transparent electrode of the anode in the PDP according to the prior art is only 30% of the total amount.

On the other hand, the transparent electrode employed in the PDP according to the second embodiment of the present invention is a long electric rod formed with a long vertical length, as shown in Figure 7b). Accordingly, the amount of excitation of the mixed gas in the discharge cell to emit vacuum ultraviolet rays according to the positions of the transparent electrode corresponding to the cathode (Cathod) and the positive electrode corresponding to the anode during discharge of the sustain electrode pair is changed. In the region between the transparent electrode corresponding to the cathode and the transparent electrode corresponding to the anode, the maximum amount of vacuum ultraviolet rays is emitted and the amount of vacuum ultraviolet rays emitted from the anode is also significantly increased. To describe this numerically, the amount of vacuum ultraviolet rays emitted from the transparent electrode of the positive electrode in the PDP according to the second embodiment of the present invention corresponds to 40% of the total amount, the total amount of vacuum ultraviolet radiation than the PDP according to the prior art It will increase greatly.

Therefore, the sustain electrode pair (Y81, Z81) of the PDP according to the second embodiment of the present invention increases the amount of vacuum ultraviolet radiation is greatly increased compared to the conventional by adopting a long electric rod, so as to consume the conventional power consumption, The luminance characteristic is greatly improved and the efficiency characteristic is also greatly improved.

Furthermore, the metal bus electrode 89b formed on the transparent electrode 89a may be positioned at the center of the transparent electrode 89a so that a uniform voltage may be transmitted to the entire transparent electrode 89a. As a result, the PDP according to the second embodiment of the present invention efficiently consumes power.

Therefore, since the PDP according to the second embodiment of the present invention employs a stripe-type partition wall, the sustain electrode Z81 formed between the upper and lower discharge cells 78a and 78b while ensuring ease of gas injection / ejection and ease of fabrication, and By forming the narrow opposing surface 85 of the transparent electrode 89a of the scan electrode Y82, it is possible to prevent crosstalk of the PDP and to reduce power consumption, and thus have high brightness characteristics and high efficiency characteristics.

9 is a schematic plan view of a PDP according to a third embodiment of the present invention.

In the PDP according to the third embodiment of the present invention, each of the sustain electrode pairs Y91 and Z91 protrudes in the discharge cell 78a cycle, and the protrusion 85 becomes narrower toward the edge of the discharge cell 78a so that the width 85 becomes narrower. Both side walls 86 have a slanted transparent electrode 89a and a metal bus electrode 89b formed at the center of the discharge cell 78a above the transparent electrode 89a.

The inclined both sides 86 at the edge of the transparent electrode 89a are inclined with respect to the partition 63 at a predetermined inclination angle (for example, an angle between 2 and 30 ° with respect to the partition). In the transparent electrode 89a having the protrusion having the inclined both sides 86 at the edge, the transparent electrode 89a is not formed near the partition 63. As a result, the PDP employing such an electrode prevents the discharge in the vicinity of the partition 63 and minimizes the discharge consumed by the partition 63. As described above, each of the sustain electrode pairs Y91 and Z91 employing the transparent electrodes 89a having the side edges 86 having the inclined edges is removed from the partition 63 by removing the transparent electrode near the partition 63. By suppressing the inefficient discharge consumed to reduce the power consumption of the PDP. In addition, since the distance between the partition 63 and the side opposite to the partition 63 is constant, the transparent electrode 89a of the PDP according to the third embodiment of the present invention is caused by the sputtering concentration during discharge of the transparent electrode 89a. The wear phenomenon of the partition 63 and the phosphor (not shown) is reduced compared to the transparent electrode 79a of the PDP according to the first embodiment of the present invention.

The transparent electrode 89a, whose horizontal length 85 is narrowed toward the edge of the discharge cell 78a, has a probability of occurrence of discharge between the sustain electrode Z91 and the scan electrode Y92 between the upper and lower discharge cells 78a and 78b. Will be reduced. As a result, the generation of crosstalk between the upper and lower discharge cells 78a and 78b is blocked.

As described above, when the horizontal length 85 of the transparent electrode 89a facing each other between the upper and lower discharge cells 78a and 78b is narrowed to prevent discharge between the upper and lower discharge cells 78a and 78b, crosstalk is prevented from occurring. Therefore, the sustain electrode pairs Y91, Z91, Y92, and Z92 can be formed with a narrower electrode gap 68, for example, about 150 µm in the case of VGA class. As a result, the PDP according to the third embodiment of the present invention is required to reduce the discharge cell size in order to manufacture a PDP having a resolution higher than or higher than a VGA-level PDP. The short sustain electrodes pairs Y91, Z91, Y92 and Z92 are employed to facilitate the manufacture of high resolution PDPs.

In addition, the PDP according to the third embodiment of the present invention employs the sustain electrode pairs Y91 and Z91 to prevent crosstalk, so that the vertical length of the transparent electrode 89a is longer in one discharge cell 78a. It can be formed. The long vertical transparent electrode 89a will be referred to as a long electrode. As such, when the long electric rod 89a is formed in one discharge cell 78a, the amount of vacuum ultraviolet rays emitted from the mixed gas near the anode (+ electrode) during sustain discharge increases to obtain sufficient luminance. In addition, the efficiency of the PDP is also increased.

This will be described in detail with reference to FIG. 7. The amount of excitation of the mixed gas according to the position (X axis) of the transparent electrode positioned in the discharge cell during the discharge of the sustain electrode pairs Y91 and Z91 (Y axis) ) Is shown in FIG. 7.

The transparent electrode employed in the PDP according to the prior art has a short vertical length as shown in Fig. 7a). Accordingly, the amount of excitation of the mixed gas in the discharge cell to emit vacuum ultraviolet rays according to the positions of the transparent electrode corresponding to the cathode (Cathod) and the positive electrode corresponding to the anode during discharge of the sustain electrode pair is changed. Done. In other words, the maximum amount of vacuum ultraviolet rays is emitted in the region where the center of the transparent electrode corresponding to the cathode is located, and the amount of vacuum ultraviolet rays decreases rapidly toward the anode. In numerical description, the amount of vacuum ultraviolet rays emitted from the transparent electrode of the anode in the PDP according to the prior art is only 30% of the total amount.

On the other hand, the transparent electrode employed in the PDP according to the third embodiment of the present invention is a long electric rod formed with a long vertical length as shown in FIG. Accordingly, the amount of excitation of the mixed gas in the discharge cell to emit vacuum ultraviolet rays according to the positions of the transparent electrode corresponding to the cathode (Cathod) and the positive electrode corresponding to the anode during discharge of the sustain electrode pair is changed. In the region between the transparent electrode corresponding to the cathode and the transparent electrode corresponding to the anode, the maximum amount of vacuum ultraviolet rays is emitted and the amount of vacuum ultraviolet rays emitted from the anode is also significantly increased. In numerical description, the amount of vacuum ultraviolet rays emitted from the transparent electrode of the anode in the PDP according to the third embodiment of the present invention corresponds to 40% of the total amount, and the total amount of vacuum ultraviolet radiation is also lower than that of the conventional PDP. It will increase greatly.

Therefore, the sustain electrode pairs (Y91, Z91) of the PDP according to the third embodiment of the present invention increase the amount of vacuum ultraviolet radiation emitted by the long electrorods compared with the conventional ones, thus consuming the same power consumption as before. Since the luminance characteristic is greatly improved, the efficiency characteristic is also greatly improved.

Further, the metal bus electrode 89b formed on the transparent electrode 89a is formed at the edge of the transparent electrode 89a so as to be positioned at the center of the discharge cell 78a, thereby discharging the sustain electrode pairs Y91 and Z91. Easily occurs, it is possible to form a narrower electrode spacing 68 of the upper and lower discharge cells (78a, 78b). As a result, the PDP according to the third embodiment of the present invention consumes power efficiently and facilitates the manufacture of a high resolution PDP.

Therefore, since the PDP according to the third embodiment of the present invention employs a stripe-type partition wall, the sustain electrode Z91 formed between the upper and lower discharge cells 78a and 78b while ensuring ease of gas injection / ejection and ease of manufacture, and The narrow opposing surface 85 of the transparent electrode 89a of the scan electrode Y92 makes it possible to prevent crosstalk of the PDP and to reduce power consumption, thereby having high brightness characteristics and high efficiency characteristics.

As described above, the PDP according to the embodiments of the present invention can be manufactured under the same process as in the conventional manufacturing process by changing the pattern of the mask forming the sustain electrode pair, and is easy to manufacture. It has the advantages of easy gas injection and exhaust, and the advantages of PDP adopting the grid type partition wall, suppressing the generation of crosstalk, high brightness and high efficiency.

As described above, the PDP according to the present invention generates crosstalk between the upper and lower discharge cells due to the transparent electrodes patterned so that each of the sustain electrode pairs has protrusions protruding at the discharge cell period and the width of the protrusions is narrowed toward the edge of the discharge cell. Will be prevented.

In addition, in the PDP according to the present invention, crosstalk between the vertical discharge cells is prevented, so that the interval between the sustain electrode pairs between the vertical discharge cells can be narrowed. As a result, the longitudinal length of the transparent electrodes of the sustain electrode pair is formed to increase the vacuum ultraviolet emission amount, thereby improving the luminance characteristics of the PDP.

Furthermore, due to the inclined sides of the transparent electrode patterned corresponding to the shape of the partition wall, the charges discharged from the sustain electrode pair are not transferred to the mixed gas, but the loss of the amount of charge consumed to the partition wall is minimized. As a result, the PDP according to the present invention consumes less power than the conventional PDP. Therefore, the PDP according to the present invention has a high efficiency characteristic.

On the other hand, PDP according to the present invention has the advantage that can be manufactured under the same process as the conventional manufacturing process if the pattern of the mask for forming the transparent electrode is modified.

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 (5)

In a plasma display panel having a sustain electrode pair formed side by side for each discharge cell, The sustain electrode pair is plasma display panel, characterized in that the electrode area of the upper and lower cells facing the discharge cell is formed smaller than the surface facing each other. The method of claim 1, Each of the sustain electrode pairs has protrusions formed for each discharge cell, and the protrusions are formed such that the electrode areas formed on the surfaces facing the upper and lower cells of the discharge cell are smaller than the surfaces of the sustain electrode pairs facing each other. Plasma display panel. The method of claim 2, And the protrusions formed at opposite sides of the sustain electrode pair and facing up and down cells have a trapezoidal shape having different bases. The method of claim 2, And a protrusion formed on the opposite surface of the sustain electrode pair in a rectangular shape, and a protrusion formed on the surface facing the upper and lower cells has a hexagonal structure in which both corners of the upper and lower cells are cut off. The method of claim 2, And a protrusion formed on a surface facing the upper and lower cells without a protrusion on an opposing surface of the sustain electrode pair, and having a hexagonal structure in which rectangular corners of the upper and lower cells are shaved.