KR100637465B1 - Plasma display panel - Google Patents

Abstract

Plasma display panel of the present invention is to increase the luminous efficiency while lowering the discharge start voltage by applying a counter-discharge structure, the first substrate and the second substrate that is disposed facing the plurality of discharge spaces adjacent to the first substrate A first partition wall layer, a second partition wall layer adjacent to the second substrate, the discharge partition facing the discharge space, a phosphor layer formed inside the discharge cell partitioned by the two discharge spaces, and the first An address electrode formed in one direction between the partition layer and the second partition wall layer, and a first electrode formed between the first partition layer and the second partition layer in parallel with the address electrode while being electrically insulated from the address electrode. An electrode and a second electrode, wherein each of the first electrode and the second electrode is disposed in pairs in each discharge cell and protrudes toward the center of the discharge cell; Includes entry.

Plasma, display, counter discharge, display electrode, address electrode, protrusion

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

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

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

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

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

5 is a partial plan view schematically illustrating a relationship between a discharge cell and a black layer in the plasma display panel according to the first embodiment of the present invention.

6 is a partial cross-sectional view according to a second embodiment of the present invention.

7 is a partial cross-sectional view according to a third embodiment of the present invention.

8 is a partially exploded perspective view showing a plasma display panel according to a fourth embodiment of the present invention.

FIG. 9 is a partial plan view schematically illustrating a structure of an electrode and a discharge cell in a plasma display panel according to a fourth embodiment of the present invention.

FIG. 10 is a partial cross-sectional view taken along line B-B in a state in which the plasma display panel shown in FIG. 8 is coupled.

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

12 is a partial plan view schematically illustrating a relationship between a discharge cell and a black layer in a plasma display panel according to a fourth embodiment of the present invention.

13 is a partial cross-sectional view according to the fifth embodiment of the present invention.

14 to 17 are partial plan views schematically illustrating structures of electrodes and discharge cells in the plasma display panel according to the sixth to ninth embodiments of the present invention.

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel for improving luminous efficiency while lowering a discharge start voltage.

Plasma display panels (hereinafter referred to as 'PDPs') include three-electrode surface discharge type PDPs. 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 gas, 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 passivation layer formed on the surface of the dielectric layer, and most of the input energy in the positive column region is due to electron heating. It is known to be consumed.

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 which increases luminous efficiency while lowering a discharge start voltage by applying an opposite discharge structure.

According to the present invention, a plasma display panel 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 plurality of discharge spaces adjacent to the second substrate. A second partition wall partitioning opposite discharge spaces, a phosphor layer formed inside discharge cells partitioned by the two discharge spaces, and an address electrode formed along one direction between the first partition wall layer and the second partition wall layer; And a first electrode and a second electrode formed between the first barrier layer and the second barrier layer, the first electrode and the second electrode being electrically insulated from the address electrode and formed in parallel with each other. Each is disposed in pairs in each discharge cell, and includes a protrusion that protrudes toward the center of the discharge cell.

In addition, 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 the discharge adjacent to the second substrate. A second partition wall partitioning a discharge space facing the space; a phosphor layer formed inside the discharge cells partitioned by the two discharge spaces; and formed along one direction between the first partition wall layer and the second partition wall layer. A first electrode and a second electrode between the address electrode, the first barrier layer, and the second barrier layer, the first electrode and the second electrode being electrically insulated from the address electrode and formed in parallel to each other; Each of the two electrodes is disposed in pairs in each of the discharge cells, and includes a protrusion formed to protrude toward the center of the discharge cell, and the address electrode moves toward the protrusion to center the discharge cell. And a protrusion that projects toward.

In the above, the first electrode and the second electrode may include an extension part extending in a direction perpendicular to the first substrate surface at a portion corresponding to each discharge cell, and the protrusion may protrude from the extension part. This protrusion may protrude into a cuboid shape.

In the above, the first electrode and the second electrode is preferably formed of a metal electrode having excellent electrical conductivity. It is preferable that a dielectric layer is formed in an insulating structure on the outer surfaces of the first electrode, the second electrode and the address electrode, and an MgO protective film is formed on the outer surface of the dielectric layer.

Preferably, the protrusion of the second electrode is formed to be biased toward one side of the address electrode of the discharge cell, so that one discharge cell can be selected. That is, in the discharge cell, the distance d ₁ between the protrusion of the second electrode and the one side address electrode is shorter than the distance d ₂ between the protrusion of the second electrode and the other side address electrode (d ₁ < d ₂ ).

The address electrode is formed in a structure shared by a pair of neighboring discharge cells in a direction crossing the same.

The distance between the address electrode and the first substrate surface is equal to the distance between the protrusions of the first electrode and the second electrode and the first substrate surface, so that the address discharge is caused by the opposite discharge between the address electrode and the protrusion of the second electrode. Make it possible.

The thickness measured in the vertical direction of the substrate of the address electrode is formed to be thicker than the thickness measured in the vertical direction of the substrate of the protrusions of the first electrode and the second electrode, so that the opposing areas of the address electrode and the second electrode protrusion are formed. By forming a wider to form an opposite discharge more advantageously.

In the above, the discharge space formed by the second barrier layer is formed in a larger volume than the discharge space formed by the first barrier layer, thereby increasing the transmission efficiency of visible light generated in the discharge cell to improve the light emitting efficiency.

The first barrier layer is formed of a first barrier member formed in a direction parallel to the address electrode and a second barrier member formed to intersect the first barrier member, and the second barrier layer is in a direction parallel to the address electrode. It consists of a third partition member and a fourth partition member formed to intersect the third partition member, the discharge cell can be formed in a grid shape.

The first barrier rib layer may include a first barrier member formed in a direction parallel to the address electrode, and the second barrier layer may include a third barrier member formed in a direction parallel to the address electrode. Can be achieved in a stripe shape.

The phosphor layer may include a first phosphor layer formed on the first substrate side of the discharge cell and a second phosphor layer formed of the same phosphor as the phosphor of the first phosphor layer on the second substrate side of the discharge cell. . In this case, the thickness of the first phosphor layer may be thicker than the thickness of the second phosphor layer, thereby minimizing the blocking of visible light transmitted by the second phosphor layer.

A black layer having a shape corresponding to the planar direction of the address electrode, the first electrode, and the second substrate of the second electrode may be formed on the second substrate side. This black layer may be formed between the second substrate and the phosphor layer, and may also be formed on the phosphor layer.

The discharge cells arranged in the longitudinal direction of the address electrode are disposed in pairs with a first electrode to which a sustain pulse is applied in a sustain period, and a second electrode to which a sustain pulse is applied in a sustain period and a scan pulse is applied in a scan period. The first electrode-second electrode and the first electrode-second electrode may be sequentially disposed, or the first electrode-second electrode and the second electrode-first electrode may be sequentially disposed.

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 in order to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

FIG. 1 is a partially exploded perspective view illustrating a plasma display panel according to a first embodiment of the present invention, and FIG. 2 schematically illustrates structures of electrodes and discharge cells in the plasma display panel according to the first embodiment of the present invention. 3 is a partial plan view, and FIG. 3 is a partial cross-sectional view taken along the line AA of 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 discharge cell 18 formed by partitioning a plurality of discharge spaces between the rear substrate 10 and the front substrate 20 by the first barrier layer 16 and the second barrier layer 26. 28). 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 first partition layer 16 (hereinafter, referred to as a "back plate partition wall") and the second partition wall layer 26 (hereinafter, referred to as a "front plate partition wall") are disposed between the rear substrate 10 and the front substrate 20. do. 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. Substantially one discharge cell 18, 28 is formed by the discharge spaces which oppose each other on both sides. 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 wall 26 are elongated in a direction crossing each other, and correspond to the front surface of the discharge cell 18 on the rear substrate 10 side. The discharge cells 28 are formed on the substrate 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. The first and second phosphor layers 19 and 29 respectively formed in the inside of the inside are preferably formed of the same phosphor so as to generate 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 back substrate 10 in the discharge cell 18. The second phosphor layer 29 is formed on the inner surface of each of the third partition member 26a and the fourth partition member 26b in the discharge cell 28 and the surface of the back substrate 10 in the region 28.

Meanwhile, the first phosphor layer 19 formed in the discharge cell 18 of the back substrate 10 forms a dielectric layer (not shown) on the back substrate 10 and forms the back plate partition wall 16. It may be formed by applying a phosphor on the dielectric layer, or may be formed by selectively forming the back plate partition wall 16 on the back substrate 10 and applying the phosphor, without forming the dielectric layer on the back substrate 10.

Similarly, the second phosphor layer 29 formed in the discharge cell 28 of the front substrate 20 forms a dielectric layer on the front substrate 20, forms a front plate partition 26, and then phosphors on the dielectric layer. It may be formed by applying a, or may be formed by selectively forming the front plate partition wall 26 on the front substrate 20 and applying a phosphor, without forming the dielectric layer on the front substrate 20.

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 phosphors are applied thereon to form the first and second phosphor layers 19 and 29. It is also possible to form). 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. As described above, the larger the thickness t ₁ , as in the first phosphor layer 19, the better the visible light is reflected. The smaller the thickness t ₂ , as in the second phosphor layer 29, the better the visible light is transmitted. The relatively small thickness t ₂ of the second phosphor layer 29 is for efficient transmission of visible light generated in the first phosphor layer 19. That is, although it is difficult to distinguish the appearance, the second phosphor layer 29 may be partially formed on a part of the front substrate 20, and is formed by coating the phosphor in a coarse state as compared with the first phosphor layer 19. For convenience, the second phosphor layer 29 in the drawing illustrates that formed on the entire front substrate 20. As described above, the second phosphor layer 29 having a small thickness t ₂ will be described. All of the visible light generated from the first phosphor layer 19 of the back substrate 10 is entirely covered at the portion where the phosphor is not applied. It is transmitted to the substrate 20. In the part where the phosphor is applied, visible light is generated in the second phosphor layer when the vacuum ultraviolet rays collide with the phosphor of the second phosphor layer 29, and the visible light passes through the front substrate 20.

Each discharge cell is formed between the rear substrate 10 and the front substrate 20 to generate an image by generating vacuum ultraviolet rays that will collide with the first and second phosphor layers 19 and 29 thus formed by plasma discharge. Address electrodes 12 and first electrodes 31 (hereinafter referred to as "hold electrodes") and second electrodes 32 (hereinafter referred to as "scan electrodes") corresponding to (18, 28) are provided.

The address electrode 12 has one direction (y-axis direction) between the rear plate partition layer 16 and the front plate partition layer 26 with respect to the z-axis direction of the rear substrate 10 and the front substrate 20. It is formed long along. That is, the address electrode 12 is formed long in the parallel direction (y axis direction) corresponding to the first partition member 16a. The address electrodes 12 are arranged in parallel with each other while maintaining an interval corresponding to the discharge cells 18 in the x-axis direction corresponding to each of the first partition members 16a.

The address electrode 12 is shared by a pair of neighboring discharge cells 18 and 28 in a direction crossing the same (x-axis direction). That is, since the address electrode 12 is provided corresponding to the center of the first partition member 16a as shown in FIG. 2, the width of the address electrode 12 adjacent to the discharge cells 18 and 18 in the x-axis direction is 1 /. It is formed into a structure spanning by two.

As shown in FIG. 3, the address electrode 12 is disposed between the first partition member 16a provided on the rear substrate 10 side and the third partition member 26a provided on the front substrate 20 side. In the vertical direction (z-axis direction) of the front substrate 20 and the back substrate 10, the center line of the longitudinal direction (y axis direction) of the address electrode 12 and the first and third partition members 16a, The center line in the longitudinal direction (y axis direction) of the 26a) is disposed in a straight line state L. FIG.

On the other hand, the sustain electrode 31 and the scan electrode 32 form the rear plate partition layer 16 constituting the discharge cells 18 and 28 on both sides of the rear substrate 10 and the front substrate 20 in the z-axis direction. And the front plate partition layer 26, and are electrically insulated from the address electrode 12, and are formed side by side in an intersecting direction (x-axis direction).

That is, 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 each discharge cell (18, 28) are arranged in pairs on both sides. In the present exemplary embodiment, since the sustain electrode 31 and the scan electrode 32 are alternately disposed between the second partition member 16b and the fourth barrier member 26, the sustain electrode 31 and the scan electrode 32 are disposed in the longitudinal direction of the address electrode 12. It may be a criterion for distinguishing neighboring discharge cells 18 and 28 in the y-axis direction.

The scan electrode 32, together with the address electrode 12, serves to select the discharge cells 18 and 28 to be turned on by participating in the address discharge in the address section, and the sustain electrode 31 and the scan electrode 32 It plays a role in displaying the screen by engaging in maintenance discharge of maintenance section. That is, sustain pulses are applied to the sustain electrodes 31 in the sustain periods, sustain pulses are applied to the sustain electrodes 31, and scan pulses are applied in the scan periods. 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 substantially one discharge cell on both sides to form an opposite discharge structure to lower the discharge start voltage for the sustain discharge. .

To this end, the sustain electrode 31 and the scan electrode 32 are provided with protrusions 31a and 32a which protrude toward their centers so as to form discharge cells 18 and 28 on both sides, respectively. The protruding portions 31a and 32a on both sides form a discharge gap formed between the two electrodes 31 and 32 in the discharge cells 18 and 28 as a short gap, so that the discharge start voltage at the initial stage of sustain discharge. To lower it.

In addition, the sustain electrode 31 and the scan electrode 32 have a direction (z-axis perpendicular to the back substrate 10 in a portion corresponding to each of the discharge cells 18 and 28 in order to induce opposite discharge in a larger area). Direction), each having expansion portions 31b and 32b. The extension portions 31b and 32b have a vertical cross-section (h _v ) in the vertical cross-sectional structure of the back substrate 10 and the front substrate 20 in the vertical direction thereof, than the horizontal _h (h _h ) thereof. It has a long cross-sectional structure. Opposite discharges, which are widely formed in the extension portions 31b and 32b, generate strong vacuum ultraviolet rays, which impinge on the phosphor layers 19 and 29 over a large area inside the discharge cells 18 and 28. Increase the amount of visible light generated.

The protrusions 31a and 32a are parts for applying a voltage applied to the sustain electrode 31 and the scan electrode 32 to the center side of the discharge cells 18 and 28, and are formed with a larger area than other portions. It is preferable to protrude from the extended portions 31b and 32b.

The protrusions 31a and 32a can be formed in various shapes, and the opposite discharge is easily induced at the tip of the protrusions 31a and 32a, and the opposite discharge is formed between the protrusion 32a of the scan electrode 32 and the address electrode 12. It is preferable to protrude in a rectangular shape, that is, a rectangular parallelepiped shape, so that this is easily guided.

As shown in FIG. 4, the sustain electrode 31 and the scan electrode 32 are elongated in the direction crossing the address electrode 12, and thus are perpendicular to the rear substrate 10 and the front substrate 20. By providing the extension portions 31b and 32b to be formed, a smooth cross arrangement is possible without interference with the address electrodes 12 formed in a straight line.

In addition, the address electrode 12 and the back substrate 10, the distance (h ₁₎ is held distance (h ₂₎ and the scan electrodes between the protrusions (31a) and a rear substrate 10 of the electrodes 31 and 32 between Is equal to the distance h ₃ between the protrusion 32a and the back substrate 10. As a result, the protruding portion 32a of the address electrode 12 and the scanning electrode 32 face to discharge, and the protruding portion 31a of the sustain electrode 31 and the protruding portion 32a of the scanning electrode 32 face to discharge.

The sustain electrode 31 and the scan electrode 32 induce sustain discharge at a low voltage by the protrusions 31a and 32a, and then form a long gap in the extended portions 31b and 32b to form a full sustain discharge. . As a result, the discharge start voltage is lowered and the luminous efficiency is increased.

The sustain electrode 31, the scan electrode 32, and the address electrode 12 are preferably formed of a metal electrode having excellent electrical conductivity.

The sustain electrode 31, the scan electrode 32, and the address electrode 12 form dielectric layers 34 and 35 on the outer surface thereof. These dielectric layers 34 and 35 also accumulate wall charges, but form an insulating structure of the electrodes. These sustain electrodes 31, the scan electrodes 32, and the address electrodes 12 can be manufactured by the TFCS (Thick Film Ceramic Sheet) method. That is, the electrode unit including the sustain electrode 31, the scan electrode 32, and the address electrode 12 may be separately manufactured and then coupled to the back substrate 10 having the partition wall 16 formed thereon.

An MgO passivation layer 36 may be formed on the surfaces of the dielectric layers 34 and 35 respectively covering the sustain electrode 31, the scan electrode 32, and the address electrode 12. 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, the scan electrode 32, and the address electrode 12 are not formed on the front substrate 20 and the rear substrate 10, but are provided between the substrates 10 and 20. The MgO protective layer 36 applied to the dielectric layers 34 and 35 covering the sustain electrode 31, the scan electrode 32, and the address electrode 12 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.

On the other hand, as described above, the sustain electrode 31 and the scan electrode 32 correspond to the second and fourth partition members 16b and 26b which form both sides of the discharge cells 18 and 28 (both sides in the y-axis direction). Between the first and third partition members 16a and 26a provided between the two electrodes and forming the opposite sides of the discharge cells 18 and 28 (both in the x-axis direction). The protrusion 32a of the scan electrode 32 is selected so that one discharge cell 18 or 28 can be selected by an address pulse applied to the address electrode 12 and a scan pulse applied to the scan electrode 32. Is disposed adjacent to the address electrode 12 involved in the address discharge of the discharge cells 18, 28 and far from the address electrode 12 involved in the address discharge of the other discharge cells 18, 28 adjacent thereto. do. That is, the protrusion 32a of the scan electrode 32 is formed to be biased by the one side address electrode 12.

That is, the distance d ₁ between the protruding portion 32a of the scan electrode 32 and the address electrode 12 involved in the corresponding discharge cells 18, 28 is related to the other discharge cells 18, 28 adjacent thereto. It is formed shorter than the distance d ₂ from the address electrode 12 (d ₁ <d ₂ ) (see FIG. 2). In addition, since the address electrode 12 is surrounded by a dielectric layer 35 having the same dielectric constant, the address electrode 12 has the same discharge start voltage between red (R), green (G), and blue (B), and does not require a high voltage margin. .

On the other hand, on the front substrate 20 side, as shown in FIG. 5, a color layer 37 is formed to improve contrast. The black layer 37 may be formed on the surface of the front substrate 20 and then covered with the second phosphor layer 29 as shown in FIG. 3, and the second phosphor layer ( 29 may be formed (not shown) on the second phosphor layer 29.

The black layer 37 is preferably formed in a shape corresponding to the plane (x-y plane) direction of the front substrate 20 of the address electrode 12, the sustain electrode 31, and the scan electrode 32. As a result, the black layer 37 absorbs external light to improve contrast and is provided at a position where visible light is blocked by the electrodes, and visible light transmitted to the front substrate 20 in addition to being blocked by the electrodes. The luminous efficiency is improved by eliminating the additional blocking.

In addition, the sustain electrodes 31 and the scan electrodes 32 are alternately arranged in pairs in the longitudinal direction (y axis direction) of the address electrode 12, so that the discharge cells 18 and 28 are continuously arranged. ), The array of sustain electrodes 31-scanning electrodes 32 and sustain electrodes 31-scanning electrodes 32 can be sequentially and repeatedly performed. In this case, the second and fourth barrier rib members 16b and 26b of the adjacent discharge cells 18 and 28 may have the scan electrodes 32 of the one side discharge cells 18 and 28 and the other side discharge cells 18 and 28. The sustain electrode 31 is provided.

On the other hand, the sustain electrodes 31 and the scan electrodes 32 are alternately arranged in pairs in the longitudinal direction (y axis direction) of the address electrode 12, so that the discharge cells 18, which are continuously arranged The array of sustain electrodes 31-scan electrodes 32 and scan electrodes 32-sustain electrodes 31 can be sequentially and repeatedly arranged with respect to 28. In this case, the second and fourth barrier rib members 16b and 26b of the adjacent discharge cells 18 and 28 are provided with the scan electrodes 32 of both discharge cells 18 and 28, and the second and fourth barrier ribs are provided. The second and fourth partition wall members 16b and 26b adjacent to the members 16b and 26b are provided with sustain electrodes 31 of both discharge cells 18 and 28.

Hereinafter, various embodiments of the present invention will be described. Since the following embodiments are generally similar or identical in structure to the above embodiments, detailed descriptions thereof will be omitted and other parts will be described herein.

6 and 7 show a second embodiment and a third embodiment of the present invention. In these two embodiments, the back plate partition layer 16 is formed of a first partition member 16a formed in a direction parallel to the address electrode 12, and the front plate partition layer 26 is formed of the address electrode 12. It is formed of a third partition member (26a) formed in a parallel direction. Accordingly, both discharge cells 18 and 28 are formed in a stripe type that continuously extends in the direction in which the address electrodes 12 extend (y-axis direction).

In addition, in the third embodiment of FIG. 7, the thickness t ₃ measured in the vertical direction (z-axis direction) of the substrates 10 and 20 of the address electrode 12 may be a protrusion part of the sustain electrode 31. 31a and thicker than the respective thicknesses t ₄ and t ₅ measured in the direction (z-axis direction) of the protrusion 32a of the scan electrode 32. This makes it possible to face a large area of discharge between the address electrode 12 and the protrusion 32a of the scan electrode 32.

FIG. 8 is a partially exploded perspective view illustrating a plasma display panel according to a fourth embodiment of the present invention, and FIG. 9 schematically illustrates structures of electrodes and discharge cells in a plasma display panel according to a fourth embodiment of the present invention. 10 is a partial plan view, and FIG. 10 is a partial cross-sectional view taken along line BB with the plasma display panel shown in FIG. 8 coupled, and FIG. 11 schematically shows the structure of an electrode in the plasma display panel according to the fourth embodiment of the present invention. 12 is a partial perspective view, and FIG. 12 is a partial plan view schematically illustrating a relationship between a discharge cell and a black layer in a plasma display panel according to a fourth embodiment of the present invention. These figures correspond to FIGS. 1 to 5 of the first embodiment.

In this fourth embodiment, the address electrode 12 also has a protrusion 12a. That is, the protrusion 12a protrudes toward the center of the discharge cells 18 and 28 toward the protrusion 31a of the sustain electrode 31 and the protrusion 32a of the scan electrode 32. The protruding portion 12a of the address electrode 12 further forms a short gap with the protruding portion 32a of the scan electrode 32, enabling address discharge at a low voltage.

The black layer 37 is formed in a shape corresponding to the front substrate 20 of the address electrode 12, the sustain electrode 31, and the scan electrode 32 as in the first embodiment, and the address electrode 12 It is preferable that the shape is further formed by a shape corresponding to the protrusion 12a.

FIG. 13 is a fifth embodiment, in which the back plate partition walls 16 and the front plate partition walls 26 of the second and third embodiments are applied to the configuration of the fourth embodiment.

In the fifth embodiment, the thickness t ₆ measured in the vertical direction (z-axis direction) of the substrates 10 and 20 of the address electrode 12 is measured by the protrusion 31a and the scan of the sustain electrode 31. It is formed thicker than the respective thicknesses t ₇ and t ₈ measured in the direction (z-axis direction) of the protrusion 32a of the electrode 32. This makes it possible to face a large area of discharge between the address electrode 12 and the protrusion 32a of the scan electrode 32.

14 to 17 are partial plan views schematically illustrating structures of electrodes and discharge cells in the plasma display panel according to the sixth to ninth embodiments of the present invention.

These figures show that the protrusion 12a of the address electrode 12, the protrusion 31a of the sustain electrode 31, and the protrusion 32a of the scan electrode 32 are provided with the protrusion 12a of the address electrode 12. ) Can be formed in more various shapes and sizes.

In the embodiment of FIG. 14, the protrusion 31a of the sustain electrode 31 and the protrusion 32a of the scan electrode 32 are connected to the address electrode 12 in an insulating structure via the dielectric layers 34 and 35. An example in which the protrusion 12a of the address electrode 12 is spaced apart in the y-axis direction and formed in the same direction as the protrusion 12a of the address electrode 12 in another direction (x-axis direction) is shown. At this time, each length in the y-axis direction of the protrusion 31a of the sustain electrode 31 and the protrusion 32a of the scan electrode 32 is the same.

In the embodiment of FIG. 15, the protrusion 31a of the sustain electrode 31 and the protrusion 32a of the scan electrode 32 are spaced apart from the address electrode 12, and the address electrode 12 is disposed in one direction (y-axis direction). It is formed to be spaced apart from the protrusion 12a. In this case, the protrusion 12a of the address electrode 12 is positioned between the protrusion 31a of the sustain electrode 31 and the protrusion 32a of the scan electrode 32 in one direction (x-axis direction).

In the embodiment of FIG. 16, the protrusion 31a of the sustain electrode 31 and the protrusion 32a of the scan electrode 32 are spaced apart from the address electrode 12, and the address electrode 12 is disposed in one direction (y-axis direction). It is spaced apart from the protrusion 12a and is formed to have a different length. At this time, the protrusion 12a of the address electrode 12 is located between the protrusion 31a of the sustain electrode 31 and the protrusion 32a of the scan electrode 32 in one direction (x-axis direction) and is biased toward the sustain electrode 31. Is formed.

In the embodiment of FIG. 17, the protrusion 31a of the sustain electrode 31 and the protrusion 32a of the scan electrode 32 are spaced apart from the address electrode 12, and the address electrode 12 is disposed in one direction (y-axis direction). It is formed to be spaced apart from the protrusion 12a. In this case, the protrusion 12a of the address electrode 12 is positioned between the protrusion 31a of the sustain electrode 31 and the protrusion 32a of the scan electrode 32 in one direction (x-axis direction). In addition, the protrusion 32a of the scan electrode 32 is formed to have a larger width (x-axis direction) than the protrusion 31a of the sustain electrode 31.

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, the sustain electrodes and the scan electrodes are disposed in the opposite discharge structure, and the sustain electrodes and the scan electrodes are provided with protrusions, respectively, to initiate the short gap discharge at the beginning of the sustain period to initiate the discharge. When the voltage is lowered and the discharge occurs, the long gap discharge of the opposite discharge is formed to improve the luminous efficiency, and the protrusions of the scan electrode and the address electrode are disposed in the opposite discharge structure to lower the address discharge voltage.

In addition, according to the plasma display panel according to the present invention, the sustain electrode and the scan electrode are disposed in the opposite discharge structure, and in addition to the protrusions in the address electrode, the protrusions of the address electrode are arranged in the opposite discharge structure. And an address discharge caused by a short gap between the protrusion of the scan electrode and the scan electrode have an effect of further lowering the address discharge voltage.

Claims (39)

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 the discharge cells partitioned by the two discharge spaces; An address electrode formed in one direction between the first barrier layer and the second barrier layer; A first electrode and a second electrode formed between the first barrier layer and the second barrier layer, the first electrode and the second electrode being electrically insulated from the address electrode and formed in parallel with each other; Each of the first electrode and the second electrode is disposed in pairs in each discharge cell, and includes a protrusion that protrudes toward the center of the discharge cell. The method of claim 1, The first electrode and the second electrode includes an extension part extending in a direction perpendicular to the first substrate surface in a portion corresponding to each discharge cell. The method of claim 2, And a protrusion protruding from the extension. The method of claim 1, And the protrusion protruding in a rectangular parallelepiped shape. 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 a dielectric layer having an insulating structure on outer surfaces of the first electrode, the second electrode, and the address electrode. The method of claim 6, And a MgO protective film formed on an outer surface of the dielectric layer. The method of claim 1, The protrusion of the second electrode is formed to be biased toward the side of the address electrode of the discharge cell. The method of claim 8, In the discharge cell, the distance d ₁ between the protrusion of the second electrode and the one side address electrode is shorter than the distance d ₂ between the protrusion of the second electrode and the other side address electrode (d ₁ <d ₂ ) a plasma display panel. The method of claim 1, And the address electrode is shared by a pair of neighboring discharge cells in a direction crossing the address electrode. The method of claim 1, And a distance between the address electrode and the first substrate surface is equal to a distance between the protrusions of the first and second electrodes and the first substrate surface. The method of claim 1, And a thickness measured in the vertical direction of the substrate of the address electrode is thicker than a thickness measured in the vertical direction of the substrate of the protrusions of the first and second electrodes. The method according to any one of claims 1 to 12, 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 12, The first partition layer is formed of a first partition member formed in a direction parallel to the address electrode and a second partition member formed to cross the first partition member, And the second partition layer comprises a third partition member formed in a direction parallel to the address electrode and a fourth partition member intersecting the third partition member. The method according to any one of claims 1 to 12, The first partition layer is formed of a first partition member formed in a direction parallel to the address electrode, And the second partition layer is formed of a third partition member formed in a direction parallel to the address electrode. The method according to any one of claims 1 to 12, The phosphor layer is a first phosphor layer formed on the side of the first substrate of the discharge cell; And a second phosphor layer on the second substrate side of the discharge cell, the second phosphor layer being formed of the same phosphor as the phosphor of the first phosphor layer. The method of claim 16, And a thickness of the first phosphor layer is thicker than a thickness of the second phosphor layer. The method according to any one of claims 1 to 12, And a black layer having a shape corresponding to the planar direction of the address electrode, the first electrode, and the second substrate of the second electrode on the second substrate side. The method of claim 18, And the black layer is formed between the second substrate and the phosphor layer. The method according to any one of claims 1 to 12, A pair of first electrodes to which a sustain pulse is applied in a sustain period and a second electrode to which a sustain pulse is applied and a scan pulse are applied in a scan period are disposed in the discharge cells arranged in the longitudinal direction of the address electrode. And the first electrode-second electrode and the first electrode-second electrode are sequentially disposed. The method according to any one of claims 1 to 12, A pair of first electrodes to which a sustain pulse is applied in a sustain period and a second electrode to which a sustain pulse is applied and a scan pulse are applied in a scan period are disposed in the discharge cells arranged in the longitudinal direction of the address electrode. And the first electrode-second electrode and the second electrode-first electrode are sequentially disposed. 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 the discharge cells partitioned by the two discharge spaces; An address electrode formed in one direction between the first barrier layer and the second barrier layer; A first electrode and a second electrode formed between the first barrier layer and the second barrier layer, the first electrode and the second electrode being electrically insulated from the address electrode and formed in parallel with each other; Each of the first electrode and the second electrode is disposed in pairs in each discharge cell, and includes a protrusion that protrudes toward the center of the discharge cell. And the address electrode includes a protrusion protruding toward the center of the discharge cell toward the protrusion. The method of claim 22, The first electrode and the second electrode includes an extension part extending in a direction perpendicular to the first substrate surface in a portion corresponding to each discharge cell. The method of claim 23, wherein And a protrusion protruding from the extension. The method of claim 22, And a dielectric layer formed on an outer surface of the first electrode, the second electrode and the address electrode, and an MgO protective layer formed on the outer surface of the dielectric layer. The method of claim 22, The protrusion of the second electrode is formed to be biased toward the side of the address electrode of the discharge cell. The method of claim 26, In the discharge cell, the distance d ₁ between the protrusion of the second electrode and the one side address electrode is shorter than the distance d ₂ between the protrusion of the second electrode and the other side address electrode (d ₁ <d ₂ ) a plasma display panel. The method of claim 22, And the address electrode is shared by a pair of neighboring discharge cells in a direction crossing the address electrode. The method of claim 22, And a distance between the address electrode and the first substrate surface is equal to a distance between the protrusions of the first and second electrodes and the first substrate surface. The method of claim 22, And a thickness measured in the vertical direction of the substrate of the address electrode is thicker than a thickness measured in the vertical direction of the substrate of the protrusions of the first and second electrodes. The method according to any one of claims 22 to 30, 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 22 to 30, The first partition layer is formed of a first partition member formed in a direction parallel to the address electrode and a second partition member formed to cross the first partition member, And the second partition layer comprises a third partition member formed in a direction parallel to the address electrode and a fourth partition member intersecting the third partition member. The method according to any one of claims 22 to 30, The first partition layer is formed of a first partition member formed in a direction parallel to the address electrode, And the second partition layer is formed of a third partition member formed in a direction parallel to the address electrode. The method according to any one of claims 22 to 30, The phosphor layer is a first phosphor layer formed on the side of the first substrate of the discharge cell; And a second phosphor layer formed of the same phosphor as the phosphor of the first phosphor layer on the second substrate side of the discharge cell. The method of claim 34, wherein And a thickness of the first phosphor layer is thicker than a thickness of the second phosphor layer. The method according to any one of claims 22 to 30, And a black layer on the side of the second substrate, the black layer having a shape corresponding to a planar direction of the address electrode, the first electrode, and the second substrate, and corresponding to a protrusion of the address electrode. The method of claim 36, And the black layer is formed between the second substrate and the phosphor layer. The method according to any one of claims 22 to 30, A pair of first electrodes to which a sustain pulse is applied in a sustain period and a second electrode to which a sustain pulse is applied and a scan pulse are applied in a scan period are disposed in the discharge cells arranged in the longitudinal direction of the address electrode. And the first electrode-second electrode and the first electrode-second electrode are sequentially disposed. The method according to any one of claims 22 to 30, A pair of first electrodes to which a sustain pulse is applied in a sustain period and a second electrode to which a sustain pulse is applied and a scan pulse are applied in a scan period are disposed in the discharge cells arranged in the longitudinal direction of the address electrode. And the first electrode-second electrode and the second electrode-first electrode are sequentially disposed.

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