KR100599626B1 - A plasma display panel and driving method of the same - Google Patents

Abstract

In the plasma display panel of the present invention, the discharge start voltage is lowered, the reset period and the addressing period are shortened to improve the gray scale expressive power, and the plurality of discharge spaces adjacent to the first substrate and the second substrate and the first substrate are disposed to face each other. A first partition wall layer partitioning a second partition wall, a second partition wall layer partitioning a discharge space facing the discharge space adjacent to the second substrate, a phosphor layer formed inside discharge cells formed by the both discharge spaces, and Between the first partition layer and the second partition layer, the first electrode and the second electrode which are alternately arranged on both sides of the discharge cell in parallel to each other and shared by the adjacent discharge cells, respectively, and the first substrate side, It extends in a direction crossing the first electrode and the second electrode and is disposed side by side on both sides of the discharge cell, and alternately with respect to the discharge cell arranged in the extension direction. A first address electrode and the second electrode corresponding to the address.

Plasma, display, opposite discharge, address electrode, protrusion, reset period, addressing period

Description

Plasma Display Panel and Driving Method {A PLASMA DISPLAY PANEL AND DRIVING METHOD OF THE SAME}

1 is a partially exploded perspective view illustrating a plasma display panel according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view taken along line A-A with the plasma display panel shown in FIG. 1 coupled.

3 is a partial plan view schematically illustrating a structure of an electrode and a discharge cell in a plasma display panel according to an exemplary embodiment of the present invention.

4 is a partial plan view schematically illustrating a structure of a first address electrode and a discharge cell in a plasma display panel according to an exemplary embodiment of the present invention.

5 is a partial plan view schematically illustrating a structure of a second address electrode and a discharge cell in a plasma display panel according to an exemplary embodiment of the present invention.

6 is a partial perspective view schematically illustrating a structure of an electrode in a plasma display panel according to an exemplary embodiment of the present invention.

7 is a schematic diagram illustrating a connection relationship between each driver of a first address electrode and a second address electrode of a plasma display panel according to an exemplary embodiment of the present invention.

8 is a driving waveform diagram of a plasma display panel driving method according to an embodiment of the present invention.

9 is a partial perspective view schematically illustrating a structure of an electrode in a plasma display panel according to another embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel and a driving method thereof, and more particularly, to a plasma display panel and a driving method thereof for lowering a discharge start voltage and shortening a reset period and an addressing period to improve gray scale expression.

A typical plasma display panel (hereinafter referred to as 'PDP') includes a three-electrode surface discharge type PDP. The three-electrode surface discharge type PDP consists of a substrate including sustain electrodes and scan electrodes located on the same surface, and another substrate including address electrodes extending in a vertical direction spaced apart from the substrate by a predetermined distance therebetween, and discharging a discharge gas therebetween. Doing. In this PDP, the presence or absence of discharge is determined by the discharge of the scan electrode and the address electrode independently connected to each line, and the sustain discharge displaying the screen is made by the sustain electrode and the scan electrode located on the same plane.

PDP uses glow discharge to generate visible light, and after the glow discharge occurs, several steps are taken before visible light reaches the human eye. That is, when a glow discharge occurs, an excited gas is generated by the collision of electrons and gases, and ultraviolet rays are generated from the excited gases, and visible light is generated because the ultraviolet rays collide with the phosphor in the discharge cell. It passes through the transparent substrate and reaches the human eye. Through this step, input power applied to the sustain electrode and the scan electrode is considerably lost.

This glow discharge is caused by applying a voltage higher than the discharge start voltage between the two electrodes. In other words, a very high voltage is required for this discharge to start. Once discharge occurs, the voltage distribution between the cathode and the anode is distorted due to the space charge effect generated in the dielectric layers around the cathode and the anode. That is, between the two electrodes, a cathode sheath region around the cathode that consumes most of the voltage applied to the two electrodes for discharge, and an anode sheath region around the anode that consumes a portion of the voltage, And a positive column region formed between these two regions and consuming little voltage. The electron heating efficiency in the cathode sheath region depends on the secondary electron coefficient of the MgO protective film formed on the surface of the dielectric layer, and most of the input energy in the positive column region is consumed by electron heating. It is known.

The vacuum ultraviolet rays that collide with the phosphor and emit visible light are generated when the Xen gas in the excitation state is transitioned to the ground state, and the excited state of Xen is Xe gas. Is created by the collision between and electrons. Therefore, in order to increase the ratio of generating the visible light among the input energy (that is, the luminous efficiency), the electron heating efficiency must be increased to increase the collision of electrons with the xenon (Xe) gas.

In the cathode sheath region, most of the input energy is consumed, but the electron heating efficiency is low. In the positive column region, the electron heating efficiency is very high while the input energy consumption is low. Therefore, high luminous efficiency is possible because it increases the positive column region (discharge gap).

In addition, the ratio of electrons consumed among all electrons according to the change of the ratio E / n of the electric field E and the gas density n between the discharge gaps (positive column region) is equal to (E / In n), the electron consumption ratio is known to increase in the order of xenon excitation (Xe *), xenon ion (Xe ⁺ ), neon excitation (Ne *), and neon ion (Ne ⁺ ). Also, at the same ratio (E / n), it is known that the electron energy decreases as the Xen partial pressure increases. That is, when this electron energy decreases, the partial pressure of xenon (Xe) increases, and when the partial pressure of xenon (Xe) increases, the above-mentioned xenon excitation (Xe *), xenon ions (Xe ⁺ ), neon excitation (Ne *) ), The ratio of electrons consumed to excitation of xenon (Xe) is increased among the electrons consumed in neon ions (Ne ⁺ ), thereby improving the luminous efficiency.

As mentioned above, the increase in the positive column area increases the electron heating efficiency. Increasing the partial pressure of xenon (Xe) increases the rate of electron heating consumed for xenon excitation (Xe *) in electrons. Therefore, both of them increase electron heating efficiency, thereby improving luminous efficiency.

However, an increase in the positive column area or an increase in the Xen partial pressure all have problems of increasing the gas breakdown voltage and increasing the manufacturing cost of the PDP.

Therefore, in order to increase the luminous efficiency, it is required to implement an increase in the positive column area and an increase in the xenon partial pressure under a low discharge start voltage.

As is known, when the distance and pressure of the discharge gap are the same, the discharge start voltage required for the counter discharge structure is lower than the discharge start voltage required for the surface discharge structure.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and provides a plasma display panel and a method of driving the same, which lower the discharge start voltage and shorten the reset period and the addressing period to improve gradation expression.

The plasma display panel according to the present invention includes a first substrate and a second substrate that are disposed to face each other, a first partition layer partitioning a plurality of discharge spaces adjacent to the first substrate, and a second barrier layer adjacent to the second substrate. A second partition wall partitioning the opposite discharge space, a phosphor layer formed inside the discharge cells formed by the both discharge spaces, and between the first partition layer and the second partition wall layer, on both sides of the discharge cell. The first electrode and the second electrode, which are arranged side by side alternately and shared by the neighboring discharge cells, respectively, and extending from the first substrate side in the direction crossing the first electrode and the second electrode, It includes a first address electrode and a second address electrode disposed side by side on both sides and corresponding to the discharge cells arranged in the stretching direction.

In the above description, each of the first address electrode and the second address electrode corresponds to an elongate portion extending in the direction crossing the first electrode and the second electrode, and alternately corresponds to the discharge cell disposed in the elongating direction. It includes an extension that extends to the center portion of the discharge cell. At this time, the extended portion of the first address electrode and the extended portion of the second address electrode are alternately arranged with respect to the discharge cells arranged in the address electrode extension direction.

Each of the extension parts of the first address electrode and the second address electrode is parallel to each other, and extends in pairs to one side partition member formed to be parallel to the address electrode in the first partition layer. The first address electrode and the second address electrode may be formed of a metal electrode having excellent conductivity, and may be formed on an inner surface of the first substrate and covered with a dielectric layer.

In the above description, the first electrode and the second electrode have a cross-sectional structure in which the vertical length h _v of the first and second electrodes is longer than the horizontal length h _{h in the} vertical cross-sectional structure of the first substrate and the second substrate. Has The first electrode and the second electrode may be formed of a metal electrode having excellent conductivity, and may be surrounded by a dielectric layer. This dielectric layer is preferably covered with an MgO protective film.

In the above, it is preferable that the discharge space formed by the second partition wall layer is formed in a larger volume than the discharge space formed by the first partition wall layer.

The first barrier layer may include a first barrier member formed in parallel with an extension of the address electrode, and a second barrier member formed to cross the first barrier member, and the second barrier layer may be formed in the first barrier member. And a third partition member formed to correspond to the partition member and a fourth partition member formed to intersect the third partition member.

In addition, the method of driving a plasma display panel according to the present invention includes a first electrode and a second electrode which are alternately arranged on both sides of the discharge cell and are shared by the discharge cells adjacent to each other, and on the one side substrate, the first electrode and the second electrode. A plasma including a first address electrode and a second address electrode that extend in a direction crossing the electrode and the second electrode and are disposed side by side on both sides of the discharge cell, and alternately correspond to the discharge cells disposed in the stretch direction; A method of driving a display panel, the method comprising: applying a scan pulse to a second electrode shared between a neighboring one discharge cell and another discharge cell in an addressing period, and a side different from the one discharge cell to which the scan pulse is applied; Addressing the discharge cells.

In the addressing step, one of the neighboring discharge cells is addressed by an address pulse applied to the first address electrode, and the other side of the discharge cells is addressed by an address pulse applied to the second address electrode.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

1 is a partially exploded perspective view illustrating a plasma display panel according to an exemplary embodiment of the present invention, and FIG. 2 is a partial cross-sectional view taken along line A-A with the plasma display panel shown in FIG.

Referring to the PDP with reference to the drawings, the PDP of the present invention is basically a first substrate (10, hereinafter referred to as a "back substrate") and a second substrate (20, hereinafter referred to as a "front substrate") arranged at a predetermined interval And a first partition layer 16 (hereinafter referred to as a "back plate partition wall") and a second partition wall layer 26 (hereinafter referred to as a "front plate partition wall") between the rear substrate 10 and the front substrate 20. Discharge cells 18, 28 formed by partitioning a plurality of discharge spaces. Phosphor layers 19 and 29 are formed in the discharge cells 18 and 28 to absorb vacuum ultraviolet rays and emit visible light, and discharge gas (for example, xenon (Xe) and Mixed gas containing neon or the like).

The back plate partition wall 16 and the front plate partition wall 26 are formed and disposed in a structure corresponding to each other between the back substrate 10 and the front substrate 20. The back plate partition wall 16 protrudes toward the front substrate 20 adjacent to the back substrate 10, and the front plate partition wall 26 corresponds to the back plate partition wall 16 on the front substrate 20. Adjacent to the rear substrate 10 is formed.

The back plate partition wall 16 divides a plurality of discharge spaces adjacent to the back substrate 10 to form discharge cells 18 on one side, and the front plate partition wall 26 has a plurality of adjacent face plates 20. The discharge space of the compartment is divided to form a discharge cell 28 on the other side. Thus, substantially one discharge cell 18, 28 is formed by the discharge spaces opposing each other (in the z-axis direction). In the present invention, unless otherwise specified for the discharge cells 18 and 28, the discharge cells 18 and 28 mean discharge spaces formed as one by both discharge spaces. The discharge space formed by the back plate partition wall 16, that is, the one side discharge cell 18 is formed smaller than the discharge space formed by the front plate partition wall 26, that is, the volume of the other side discharge cell 28. This can improve the transmittance of visible light generated in the discharge cells 18 and 28 to the front substrate 10.

The back plate partition wall 16 and the front plate partition wall 26 can form the discharge cells 18 and 28 in various shapes, such as a square or a hexagon, and the present embodiment has the discharge cells 18 and 28 formed in a square. To illustrate.

Referring to this, the rear plate partition 16 is formed on the rear substrate 10. In this embodiment, the first partition member 16a and the first partition member are formed to be formed long in one direction (y axis direction). It is formed long to intersect with (16a), and comprises a second partition member (16b) on the rear substrate 10 side to partition the discharge cells 18, which are discharge spaces, into independent discharge spaces.

The front plate partition wall 26 is formed on the front substrate 20. The third partition member 26a protrudes toward the rear substrate 10 in a shape corresponding to the first partition wall member 16a and the third partition wall member 26a. And a fourth partition member 26b protruding toward the rear substrate 10 in a shape corresponding to the second partition member 16b. Accordingly, the third partition member 26a and the fourth partition member 26b of the front plate partition 26 are formed long in the direction crossing each other, and correspond to the front substrate 10 corresponding to the discharge cell 18 on the rear substrate 10. The discharge cells 28 are formed on the (20) side.

The phosphor layers 19 and 29 are formed in the discharge cells 18 and 28 respectively partitioned by the back plate partition 16 and the front plate partition 26 as described above. That is, the phosphor layers 19 and 29 may include the first phosphor layer 19 which forms the one side discharge cell 18 on the back substrate 10 and the other side discharge cell 28 that faces the discharge cell 18. Including the second phosphor layer 29 formed on the front substrate 20, visible light is generated on both sides of the discharge cells 18 and 28 which are substantially one, thereby improving luminous efficiency.

The discharge cells 18 formed by the back plate partition wall 16 and the discharge cells 28 formed by the front plate partition wall 26 are substantially one discharge cell 18, 28. Each of the first phosphor layer 19 and the second phosphor layer 29 formed inside of is preferably formed of a phosphor that generates visible light of the same color by collision of vacuum ultraviolet rays generated by gas discharge.

At this time, the first phosphor layer 19 is formed on the inner surface of each of the first partition member 16a and the second partition member 16b in the discharge cell 18 and the surface of the dielectric layer 17 in the discharge cell 18, The second phosphor layer 29 is formed on each of the inner surfaces of the third partition member 26a and the fourth partition member 26b in the discharge cell 28.

On the other hand, the first phosphor layer 19 formed in the discharge cell 18 of the back substrate 10 is formed with a dielectric layer 17 on the back substrate 10 as described above and the back plate partition 16 Next, it may be formed by applying a phosphor on the dielectric layer 17, or alternatively, without forming a dielectric layer on the back substrate 10, by forming the back plate partition wall 16 on the back substrate 10 and applying the phosphor. It may be formed.

Similarly, the second phosphor layer 29 formed in the discharge cell 28 of the front substrate 20 forms a dielectric layer (not shown) on the front substrate 20 and forms the front plate partition 26. It may be formed by applying a phosphor on the dielectric layer, and as shown, instead of selectively forming the dielectric layer on the front substrate 20, a front plate partition 26 is formed on the front substrate 20 and the phosphor is coated. It may be formed by.

Furthermore, each of the rear substrate 10 and the front substrate 20 is etched to correspond to the shape of the discharge cells 18 and 28, and then a phosphor is coated thereon to apply the first phosphor layer 19 and the second phosphor. It is also possible to form each of the layers 29. At this time, the back plate partition 16 and the back substrate 10 is made of the same material, the front plate partition 26 is made of the same material as the front substrate 20.

In the above, after the sustain discharge, the first phosphor layer 19 is absorbed in the discharge cell 18, the second phosphor layer 29 is absorbed vacuum ultraviolet rays in the discharge cell 28 toward the front substrate 20 Generates visible visible light. In addition, since the second phosphor layer 29 transmits the visible light, the thickness t ₁ of the first phosphor layer 19 formed on the rear substrate 10 is a second layer formed on the front substrate 20. It is preferable to form thicker (t ₁ > t ₂ ) than the thickness t ₂ of the phosphor layer 29. As a result, the luminous efficiency may be increased by minimizing the loss of vacuum ultraviolet rays.

Between the rear substrate 10 and the front substrate 20 to generate an image by generating a plasma discharge vacuum ultraviolet rays that will be impinged on the first phosphor layer 19 and the second phosphor layer 29 formed as described above. The first address electrode 11, the second address electrode 12, and the first electrode 31 (hereinafter referred to as 'holding electrode') and the second electrode 32 corresponding to each of the discharge cells 18 and 28. Scan electrodes').

3 is a partial plan view schematically illustrating a structure of an electrode and a discharge cell in a plasma display panel according to an embodiment of the present invention, and FIG. 4 is a view showing a first address electrode and a first address electrode in a plasma display panel according to an embodiment of the present invention. 5 is a partial plan view schematically illustrating a structure of a discharge cell. FIG. 5 is a partial plan view schematically illustrating a structure of a second address electrode and a discharge cell in a plasma display panel according to an exemplary embodiment of the present invention. A partial perspective view schematically showing a structure of an electrode in a plasma display panel according to an embodiment of the present invention.

The sustain electrode 31 and the scan electrode 32 are arranged side by side alternately on both sides (y axis direction) of each discharge cell 18, 28. The sustain electrodes 31 are adjacent to the discharge cells 18 and 28 along the extension direction (y axis direction) of the first and second address electrodes 11 and 12 based on one discharge cell 18 and 28. The scan electrode 32 is shared to one side of the discharge cells 18 and 28 adjacent to this y-axis direction. As a result, the sustain electrode 31 and the scan electrode 32 are each involved in the sustain discharge of two adjacent discharge cells 18 and 28.

The first address electrode 11 and the second address electrode 12 intersect the sustain electrode 31 and the scan electrode 32, and are disposed in parallel with each other in pairs corresponding to the respective discharge cells 18 and 28. Each is involved in the addressing of neighboring discharge cells 18 and 28. That is, the first and second address electrodes 11 and 12 are arranged in pairs based on one discharge cell 18 and 28, but the first address electrode 11 is adjacent to the discharge cells 18 and 28. The second address electrode 12 acts on the addressing of the other discharge cells 18 and 28 adjacent to the discharge cells 18 and 28 addressed by the first address electrode 11. That is, the first address electrode 11 and the second address electrode 12 alternately address the discharge cells 18 and 28 arranged in the y-axis direction.

The first and second address electrodes 11 and 12 are formed long on the rear substrate 10 in one direction (y-axis direction) so as to enable this operation, and are formed on both sides of the discharge cells 18 and 28. Placed side by side. In addition, the first substrate electrode 11 and the second address electrode 12 have the sustain electrode 31 and the scan electrode 32 between the rear substrate 10 and the front substrate 20 with the rear substrate 10. It is provided on the side. In the present embodiment, the first and second address electrodes 11 and 12 are provided on the rear substrate 10 and covered with the dielectric layer 17.

As shown in FIG. 4, the first address electrode 11 extends in the direction (y-axis direction) that intersects the extending direction (x-axis direction) of the sustain electrode 31 and the scan electrode 32. 11a and an expansion portion 11b extending in correspondence with the central portion of each discharge cell 18 in the extension portion 11a. The first address electrode 11 extends in the y-axis direction on the inner surface of the back substrate 10 and is covered with the dielectric layer 17 that accumulates wall charges during the addressing period. Since the first address electrode 11 is provided on the rear substrate 10 side that reflects visible light, the first address electrode 11 may be formed of an opaque material, and thus may be formed of a metal electrode having excellent electrical conductivity.

Each of the extending parts 11a and 12a of the first and second address electrodes 11 and 12 corresponds to the first partition member 16a of the back plate partition layer 16 as shown in FIG. 3 in pairs. And extended so that each of the expansion portions 11b and 12b is alternately arranged in the discharge cells 18 continuous in the y-axis direction.

In addition, the extension portion 11b formed corresponding to the center portion of the discharge cell 18 increases the area corresponding to the scan electrode 32 to enable address discharge in the addressing period by low voltage. The expansion part 11b is provided alternately with respect to the discharge cells 18 and 28 continuous in the y axis direction, and alternately addresses the discharge cells 18 and 28 continuing in the y axis direction. That is, although the first and second address electrodes 11 and 12 are disposed in one discharge cell 18 and 28, the extension part 11b of the first address electrode 11 is disposed in the discharge cell 18. It is formed corresponding to the even group of 28) and acts on it. In addition, the first address electrode 11 extends in the y-axis direction as described above, and the plurality of first address electrodes 11 formed in this way correspond to the discharge cells 18 and 28 in the x-axis direction. They are placed next to each other while maintaining the spacing.

As shown in FIG. 5, the second address electrode 12 extends in the direction (y-axis direction) that crosses the extending direction (x-axis direction) of the sustain electrode 31 and the scan electrode 32. 12a and an extension portion 12b extending in correspondence with the central portion of each discharge cell 18 in the extension portion 12a. The second address electrode 12 extends in the y-axis direction on the inner surface of the back substrate 10 and is covered with the dielectric layer 17 that accumulates wall charges during the addressing period. Since the second address electrode 12 is provided on the rear substrate 10 side that reflects visible light, the second address electrode 12 may be formed of an opaque material, and thus may be formed of a metal electrode having excellent electrical conductivity.

In addition, the extended portion 12b formed corresponding to the center portion of the discharge cell 18 widens the corresponding area with the scan electrode 32 to enable address discharge in the addressing period by low voltage. The extension part 12b is provided alternately with respect to the discharge cells 18 and 28 continuous in the y axis direction, and alternately addresses the discharge cells 18 and 28 continuing in the y axis direction. That is, although the first and second address electrodes 11 and 12 are disposed in one discharge cell 18 and 28, the extension part 12b of the second address electrode 12 is continuously arranged in the discharge cell 18. It forms in correspondence to the odd group of 28, and acts on this. In addition, the second address electrode 12 extends in the y-axis direction as described above, and the plurality of second address electrodes 12 thus formed correspond to the discharge cells 18 and 28 in the x-axis direction. They are placed next to each other while maintaining the spacing.

Since the first and second address electrodes 11 and 12 are disposed side by side on the rear substrate 10 side of the same discharge cell 18, the first and second address electrodes 11 and 12 are disposed on the address pulses applied to them and the scan pulses applied to the scan electrodes 32, respectively. Thereby, the discharge cells 18 and 28 in which the extension portions 11b and 12b corresponding to the center portions of the discharge cells 18 and 28 are arranged in the y-axis direction so that one discharge cell 18 and 28 can be addressed. Alternately with each other.

Discharge cells 18 and 28 in which the first and second address electrodes 11 and 12 are disposed on both sides of one discharge cell 18 and 28, but the extension part 11b of the first address electrode 11 are continuously arranged. Is formed in correspondence with an even group of cells, and the extension portion 12b of the second address electrode 12 is arranged in an odd group of discharge cells 18 and 28 arranged in a continuous (y-axis direction). It may be formed correspondingly, or may be arranged interchangeably. Since the first and second address electrodes 11 and 12 are addressed by interaction with the shared scan electrode 32, the extension 11b of the first address electrode 11 may serve as the scan electrode 32. Corresponding to the center portion of the shared one side discharge cells 18a and 28a (see FIG. 4), the extension 12b of the second address electrode 12 has the other side discharge cell sharing the same scan electrode 32. It corresponds to the center of (18a, 28a) (refer FIG. 5). That is, the expansion parts 11b and 12b are alternately arranged in the discharge cells 18 and 28 which are continuously arranged along the y axis direction.

In addition, since the first and second address electrodes 11 and 12 are provided on the rear substrate 10 side, each of the extension parts 11b and 12b is disposed on the rear substrate 10 side of the discharge cell 18, respectively. Addressing action. The first and second address electrodes 11 and 12 have respective extension portions 11b and 12b corresponding to the center portion of the discharge cell 18, and the extension portions 11b and 12b have two discharge cells. It is located on both sides of the scan electrode 32 shared by (18). Accordingly, each of the extension parts 11b and 12b of the first and second address electrodes 11 and 12 is a part for applying the address pulses applied to the discharge cells 18 to each other. Therefore, when scan pulses are applied to the scan electrodes 32 and address pulses are applied to the first and second address electrodes 11 and 12, two addressing is realized in one scan.

On the other hand, the sustain electrode 31 and the scan electrode 32 are formed on the back plate partition wall 16 constituting the discharge cells 18, 28 on both sides of the back substrate 10 and the front substrate 20 in the z-axis direction. It is formed between the front plate partition wall 26 and is formed long along the direction (x axis direction) which is electrically insulated from the first and second address electrodes 11 and 12 and intersects it. The sustain electrode 31 is disposed on one side of the discharge cells 18, 28, and the scan electrode 32 is disposed side by side with the sustain electrode 31 on the other side of the discharge cells 18, 28. The sustain electrode 31 and the scan electrode 32 are shared by neighboring discharge cells 18, 28 alternately in discharge cells 18, 28 arranged in succession. That is, when the two discharge cells 18 and 28 are continuously arranged as a reference, the scan electrode 32 divides the second and fourth partition members 16b and 26b which divide the two discharge cells 18 and 28 in the middle. It is provided between, and the sustain electrode 31 is provided on both sides of the two discharge cells (18, 28). Of course, the sustain electrode 31 is also provided in the second and fourth partition members 16b and 26b which divide two adjacent discharge cells 18 and 28 in the middle. Therefore, when address pulses are applied to the first and second address electrodes 11 and 12 and scan pulses are applied to the scan electrodes 32, two addressing for selecting two neighboring discharge cells 18 and 28 in one scan. This is implemented, so that the addressing period is shortened. When a reset pulse is applied to the scan electrode 32, the two discharge cells 18 and 28 shared by the scan electrode 32 are reset to shorten the reset period. In this way, the reset period and the addressing period are shortened, so the sustain period is long, and the extension of the sustain period increases the number of sustain pulses, thereby improving the gray scale expressive power.

As shown in FIG. 6, the sustain electrode 31 and the scan electrode 32 are formed and arranged to implement two addressing in one scan action with respect to the discharge cells 18 and 28 neighboring in the y-axis direction. One side discharge cell 18, 28 sharing the scan electrode 32 is provided with an extension 11b of the first address electrode 11, and the other side discharge cell 18, of the shared scan electrode 32. 28 is provided with an extension 12b of the second address electrode 12.

The sustain electrode 31 and the scan electrode 32 are formed to extend between the second partition member 16b and the fourth partition member 26b in parallel with them (x-axis direction), and are continuously disposed. Alternately arranged in cells 18 and 28. In the present embodiment, the sustain electrode 31 and the scan electrode 32 are disposed between the second partition member 16b and the fourth partition member 26, so that the first and second address electrodes 11 and 12 extend in the longitudinal direction. (y-axis direction) can be a reference to distinguish the neighboring discharge cells (18, 28), shared in the neighboring discharge cells (18, 18) in this direction to maintain discharge of the two discharge cells (18, 18) It will work.

The scan electrode 32, together with the first and second address electrodes 11 and 12, plays a role in selecting discharge cells 18 and 28 to be turned on by being involved in the addressing of the addressing period. The scan electrode 32 serves to display the screen by participating in the sustain discharge during the sustain period. That is, the sustain pulse is applied to the sustain electrode 31 in the sustain period, the sustain pulse is applied in the sustain period, and the scan pulse is applied in the scan period. However, since the electrodes may perform their roles differently according to the signal voltage applied thereto, the present invention does not need to be limited to the above.

The sustain electrode 31 and the scan electrode 32 are provided between the substrates 10 and 20 so as to partition the discharge cells 18 and 28 which are substantially one to both sides. The discharge start voltage can be lowered. To this end, the sustain electrode 31 and the scan electrode 32 have a rear substrate 10 and a front substrate 20 at portions corresponding to the respective discharge cells 18 and 28 in order to induce opposite discharge in a larger area. In the cross-sectional structure cut in the direction perpendicular to the (z-axis direction), its vertical length (h _v ) has a cross-sectional structure longer than its horizontal length (h _h ). Opposite discharges, which are widely formed in the sustain electrode 31 and the scan electrode 32, generate strong vacuum ultraviolet rays, and the strong vacuum ultraviolet rays cover the phosphor layers 19 and 29 over a large area inside the discharge cells 18 and 28. Increases the amount of visible light generated by collision with

Since the sustain electrode 31 and the scan electrode 32 are provided between the second partition member 16b and the fourth partition member 26a which are non-discharge regions, side effects of blocking visible light generated in the discharge cells 18 and 28 are prevented. It may be formed of an opaque material because it does not have, and may be formed of a metal positive electrode having excellent electrical conductivity.

The sustain electrode 31 and the scan electrode 32 form opposite discharges in the discharge cells 18 and 28 to lower the discharge start voltage, and the two discharge cells 18 and 28 sharing the scan electrode 32. Implementing 2 resets in 1 reset and 2 addressing in 1 scan can reduce the reset period and addressing period.

The sustain electrode 31 and the scan electrode 32 form a dielectric layer 34 on the outer surface thereof. The dielectric layer 34 accumulates wall charges, surrounds the sustain electrode 31 and the scan electrode 32, and is provided with a dielectric layer 35 on the side where the electrodes 31 and 32 are not provided, respectively. A lattice structure corresponding to the discharge cells 18 and 28 is formed. These sustain electrodes 31 and the scan electrodes 32 can be manufactured by the TFCS (Thick Film Ceramic Sheet) method. That is, the sustain electrode 31 and the scan electrode 32 may be separately manufactured and then coupled to the rear substrate 10 having the rear plate partition 16 formed thereon.

An MgO passivation layer 36 may be formed on the dielectric layer 34 and the surface of the dielectric layer 35 respectively covering the sustain electrode 31 and the scan electrode 32. In particular, the MgO passivation layer 36 may be formed in a portion exposed to the plasma discharge occurring in the discharge space inside the discharge cell 18. In the present embodiment, the sustain electrode 31 and the scan electrode 32 are not formed on the front substrate 20 and the rear substrate 10, but are provided between the substrates 10 and 20, so that the sustain electrodes 31 and The dielectric layer 34 covering the scan electrode 32 and the MgO protective layer 36 applied to the dielectric layer 35 may be made of MgO having visible light impermeability. This visible light-transmissive MgO has a much higher secondary electron emission coefficient value than the visible light-transmissive MgO, and thus the discharge start voltage can be further lowered.

As shown in FIG. 7, the first address electrode 11 is drawn out to one side of the substrates 10 and 20 to be connected to the first address electrode driver 11c, and the second address electrode 12 is connected to the substrate ( 10 and 20 are connected to the second address electrode driver 12c and are connected to the second address electrode driver 12c to enable two addressing of the adjacent discharge cells 18 and 28 sharing the scan electrode 32 in one scan. As described above, since the first and second address electrodes 11 and 12 are drawn to both sides of the substrates 10 and 20 to apply respective address pulses, electromagnetic wave noise can be reduced.

As shown in FIG. 8, the driving method of the PDP configured as described above is provided to the scan electrode 32 shared by the adjacent one side discharge cells 18 and 28 and the other discharge cells 18 and 28 in the addressing period. Applying a scan pulse (V _sc ) and addressing the one side discharge cells (18, 28) and the other side discharge cells (18, 28) to which the scan pulse has been applied.

In this addressing step, one of the two discharge cells 18 and 28 adjacent to each other is addressed by an address pulse V _a1 applied to the first address electrode 11, and the other discharge cell ( 18 and 28 are addressed by an address pulse V _a2 applied to the second address electrode 12.

In the reset step performed before the scan and addressing step, the reset pulse V _r is applied to one scan electrode 32 to interact with the sustain electrodes 31 provided on both sides of the scan electrode 32. Thus, two neighboring discharge cells 18 and 28 are simultaneously reset. A known waveform may be used for the reset pulse V _r applied in this reset period, and a known waveform may be used for the sustain pulse V _s applied in the sustain period.

Meanwhile, a black layer 37 may be formed on the front substrate 20 side to improve contrast as shown in FIG. 2. The black layer 37 may be formed on the surface of the front substrate 20 as shown in FIG. 2 and then covered with the front plate partition layer 26 or the second phosphor layer 29. 20 may be formed (not shown) on the second phosphor layer 29 after the second phosphor layer 29 is formed.

9 is a partial perspective view schematically illustrating a structure of an electrode in a plasma display panel according to another embodiment of the present invention.

Referring to this figure, the first and second address electrodes 11 and 12 are formed by bending the respective extension portions 11a and 12a to the center portion of the discharge cell 18, and the respective extension portions on this portion. The thing provided with (11b, 12b) is illustrated.

In the embodiment of FIG. 9, when the expansion parts 11b and 12b have the same area as those of the embodiment of FIG. 6, the expansion parts 11b and 12b may be arranged in a center portion of the discharge cell 18. Let's do it. That is, in this embodiment, the first and second address electrodes 11 and 12 may be implemented in various shapes, and the address area is increased by increasing the opposing areas of the first and second address electrodes 11 and 12 and the scan electrode 32. It shows that the discharge start voltage can be further lowered.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications or changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. It goes without saying that it belongs to the scope of the present invention.

As described above, according to the plasma display panel according to the present invention, electrodes are provided between a rear substrate and a front substrate, and among these electrodes, a sustain electrode is provided on one side of the discharge cell and a scan electrode is placed on the other side of the discharge cell. It is provided with an opposite discharge structure, and the sustain electrode and the scan electrode are alternately arranged to be shared with neighboring discharge cells, and the first and second address electrodes provided on the rear substrate side are even-numbered discharge cells and odd-numbered discharge cells, respectively. Since the discharge start voltage is lowered by opposing discharge of the sustain electrode and the scan electrode, the scan electrode is shared by the neighboring discharge cells and simultaneously resets the even-numbered discharge cells and the odd-numbered discharge cells at the same time. In addition, since the first address electrode and the second address electrode simultaneously address the even-numbered discharge cells and the odd-numbered discharge cells, It has the effect of shortening the dressing time. The shortening of the reset period and the addressing period in this way extends the holding interval, thereby improving the gray scale expressive power.

Claims (16)

A first substrate and a second substrate disposed to face each other; A first barrier rib layer partitioning a plurality of discharge spaces adjacent to the first substrate; A second partition wall layer adjacent to the second substrate and partitioning a discharge space facing the discharge space; A phosphor layer formed inside discharge cells formed by the discharge spaces on both sides; A first electrode and a second electrode between the first barrier layer and the second barrier layer, which are alternately disposed on both sides of the discharge cell and shared by the adjacent discharge cells; And A first address extending from the first substrate side in a direction crossing the first electrode and the second electrode and disposed side by side on both sides of the discharge cell, and alternately corresponding to the discharge cells arranged in the stretching direction; A plasma display panel comprising an electrode and a second address electrode. The method of claim 1, The first address electrode may include an extension part extending in a direction crossing the first electrode and the second electrode; And an extension part corresponding to the discharge cells arranged in the extension direction and extending from the extension part to the center portion of the discharge cell. The method of claim 1, The second address electrode may include an extension part extending in a direction crossing the first electrode and the second electrode. And an extension part corresponding to the discharge cells arranged in the extension direction and extending from the extension part to the center portion of the discharge cell. The method of claim 1, An elongate portion extending from the first address electrode to cross the first electrode and the second electrode and an elongated portion parallel to the elongated portion of the first address electrode in the second address electrode are parallel to the address electrode in the first partition wall layer. And a plasma display panel extending in a pair to correspond to one side partition member to be formed. The method of claim 4, wherein An extension part extending from the extension part of the first address electrode to the center part of the corresponding discharge cell and an extension part extending from the extension part of the second address electrode to the center part of the corresponding discharge cell; Plasma display panel disposed alternately with respect to. The method of claim 1, And the first address electrode and the second address electrode are formed of a metal electrode. The method of claim 1, And the first address electrode and the second address electrode are formed on an inner surface of the first substrate and covered with a dielectric layer. The method of claim 1, The first electrode and the second electrode have a cross-sectional structure in which the vertical length h _v of the first and second electrodes is cut in the vertical direction of the first substrate and the second substrate, which is longer than the horizontal length h _h . Plasma display panel. The method of claim 1, The first electrode and the second electrode is a plasma display panel formed of a metal electrode. The method of claim 1, And the first electrode and the second electrode are surrounded by a dielectric layer. The method of claim 10, And the dielectric layer is covered with an MgO protective film. The method according to any one of claims 1 to 11, And a discharge space formed by the second barrier layer is larger than a discharge space formed by the first barrier layer. The method according to any one of claims 1 to 11, The first barrier layer is formed of a first barrier member formed in parallel with the extending part of the address electrode and a second barrier member formed to intersect the first barrier member. And the second partition layer comprises a third partition member formed corresponding to the first partition member and a fourth partition member intersecting the third partition member. A first electrode and a second electrode, which are alternately disposed on both sides of the discharge cell and shared with each other in the neighboring discharge cells, and in one substrate, are extended in a direction crossing the first electrode and the second electrode, and In the driving method of the plasma display panel, which is disposed on both sides of the discharge cells and includes a first address electrode and a second address electrode which alternately correspond to the discharge cells arranged in the stretch direction. In the addressing period, applying a scan pulse to a second electrode shared by the neighboring one side discharge cell and the other side discharge cell; And And addressing the one side discharge cell and the other side discharge cell to which the scan pulse is applied. The method of claim 14, In the addressing step, a plasma display panel driving method of one of the neighboring discharge cells, addressing one discharge cell with an address pulse applied to the first address electrode. The method of claim 14, And the addressing step addresses an address pulse to which the other side of the discharge cells is applied to the second address electrode.

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