KR100590083B1 - Plasma display panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel having an electrode structure that is advantageous for realizing a higher density, high luminance display.

In order to achieve the above object, a plasma display panel according to the present invention includes a rear substrate and a front substrate disposed to face each other; Address electrodes formed on the rear substrate in parallel in one direction; A partition wall disposed in a space between the rear substrate and the front substrate to partition a plurality of discharge cells; Phosphor layers formed in the discharge cells; First and second electrodes corresponding to each discharge cell while extending in a direction crossing the address electrode on the front substrate; A third electrode and a fourth electrode which are disposed to be spaced apart from the first electrode and the second electrode and protrude toward the rear substrate in a direction away from the front substrate, so as to face each other with a space therebetween; field; Fifth electrodes corresponding to each discharge cell while extending in a direction crossing the address electrode between the first electrode and the second electrode; And a dielectric layer covering the first electrode, the second electrode, and the fifth electrode, wherein a groove is formed in the dielectric layer corresponding to the center of the discharge cell.

Plasma Display Panel, Counter Discharge, Metal Electrode, Dielectric

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

1 is a graph schematically showing a voltage distribution between a cathode and an anode in a typical glow discharge.

2 is a partially exploded perspective view showing a PDP according to an embodiment of the present invention.

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

4 is a partial cross-sectional view taken along the line A-A by combining the PDP shown in FIG.

5 is a partial cross-sectional view showing in detail the front plate structure of the PDP according to an embodiment of the present invention.

6 is a partial cross-sectional view schematically showing the size and location of the cathode spot and the anode spot over time after the discharge start in the PDP according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having an electrode structure that is advantageous for realizing a high density and high luminance display.

In general, a plasma display panel (hereinafter referred to as a 'PDP') is used to implement an image using visible light generated by a vacuum ultraviolet ray (VUV) emitted from a plasma obtained through gas discharge. Display element. Such a PDP can realize an ultra-large screen of 60 inches or more with a thickness of only 10 cm or less, and is a self-luminous display device such as a CRT. In addition, the manufacturing method is simpler than LCD, and thus has advantages in terms of productivity and cost.

The structure of the PDP has been developed for a long time since the 1970s, and the structure generally known is a three-electrode surface discharge type structure. The three-electrode surface discharge type structure consists of one substrate including two electrodes located on the same surface and another substrate including address electrodes vertically spaced apart from each other at a predetermined distance therebetween, with a discharge gas enclosed therebetween. Structure. In general, the presence or absence of the discharge is determined by the discharge of the address electrode facing the scan electrode independently connected to each line, and the sustain discharge indicating the luminance is performed by two electrode groups located on the same plane. .

PDP uses glow discharge to make visible light visible to humans, which takes several steps to reach the human eye after the glow discharge occurs. That is, when the glow discharge occurs, the excited gas is generated by collision between electrons and gases, and ultraviolet rays are generated from the excited gas. Ultraviolet rays impinge on the phosphor in the discharge cell to generate visible light, and the visible light passes through the transparent substrate on the front surface and reaches the human eye. This step results in a significant loss of input power.

Glow discharges are usually obtained by applying a voltage above the discharge start voltage between two electrodes under a low atmospheric pressure (<1 atm). The discharge start voltage is a function of the type of gas, the atmospheric pressure, and the distance between electrodes. In the case of AC discharge, in addition to these three, the discharge start voltage is also affected by the dielectric capacitance (dielectric constant, electrode area, dielectric thickness) and the frequency of the applied voltage.

Although a very high voltage is required to start the discharge, the voltage distribution between the cathode and the anode has a distorted shape as shown in FIG. FIG. 1 shows that most of the voltage is being consumed around two electrodes, that is, in areas called cathode sheath and anode sheath, and in the relatively positive column region. It can be seen that the amount of voltage is small. In particular, in the glow discharge generated in the PDP, it is known that the voltage consumed by the cathode sheath is much higher than the voltage of the anode sheath.

The emission of visible light in the phosphor is caused by the collision of the ultraviolet light with the phosphor, and the ultraviolet light is generated when the energy level is changed from the excited state of Xen to the ground state of Xen. . On the other hand, xenon Xe in an excited state is made by collision between Xen in stable state and electrons. Therefore, in order to increase the ratio of generating visible light among the input energy, that is, the luminous efficiency, the electron heating efficiency must be increased.

In general, since the electron heating efficiency in the positive column region is higher than the electron heating efficiency in the cathode sheath region, the improvement of the PDP luminous efficiency is possible by increasing the positive column region. Since the sheath region has almost the same thickness under the same pressure, it is necessary to increase the length of the discharge in order to increase the luminous efficiency.

In the case of a PDP having a three-electrode structure, discharge is initiated in the region closest to the two electrodes-at the center of the discharge cell-and the discharge then moves to the edge region of the electrode. The discharge occurs in the center region because the discharge start voltage in this region is low. In general, the discharge start voltage is a function of the product of the pressure and the distance between the electrodes, and the PDP operating region is located to the right of the minimum value of the Paschen curve. Once the discharge is initiated, the discharge is maintained under a voltage much lower than the discharge start voltage due to the formation of space charge, and the voltage between the two electrodes gradually decreases with time. After the start of the discharge, the intensity of the electric field is weakened as ions and electrons accumulate in the central region, and the discharge disappears in this region.

Cathode and anode spots move over time in areas free of surface charge, ie around the electrode edges. At this time, since the voltage applied between the two electrodes decreases with time, strong discharge occurs in the center region of the discharge cell (low light emitting efficiency), and weak discharge occurs near the edge of the discharge cell (structure having high light emitting efficiency). do. Based on the same principle, the conventional three-electrode surface discharge structure has a low ratio used for heating electrons among the input energy, resulting in low luminous efficiency.

In order to overcome the weakness of the three-electrode structure, a method of increasing the distance between the display electrodes may be considered, but this causes an increase in the discharge start voltage.

The present invention was devised to solve the above problems, and an object thereof is to form a metal electrode closer to the phosphor layer at the edge of the discharge cell to mitigate the degree of decrease in the intensity of the discharge near the edge of the discharge cell. It is to provide a plasma display panel that can be.

Another object of the present invention is to provide a plasma display panel having a discharge cell structure capable of inducing a sustain discharge generated between a pair of display electrodes to a counter discharge in order to overcome the disadvantages of discharge caused by the smaller size of the discharge cell. To provide.

In order to achieve the above object, a plasma display panel according to the present invention includes a rear substrate and a front substrate disposed to face each other; Address electrodes formed on the rear substrate in parallel in one direction; A partition wall disposed in a space between the rear substrate and the front substrate to partition a plurality of discharge cells; Phosphor layers formed in the discharge cells; First and second electrodes corresponding to each discharge cell while extending in a direction crossing the address electrode on the front substrate; A third electrode and a fourth electrode which are disposed to be spaced apart from the first electrode and the second electrode and protrude toward the rear substrate in a direction away from the front substrate, so as to face each other with a space therebetween; field; Fifth electrodes corresponding to each discharge cell while extending in a direction crossing the address electrode between the first electrode and the second electrode; And a dielectric layer covering the first electrode, the second electrode, and the fifth electrode, wherein a groove is formed in the dielectric layer corresponding to the center of the discharge cell, and the groove of the dielectric layer extends along the direction crossing the address electrode. It is formed while building.

The width of the dielectric layer measured in the direction parallel to the address electrode may be greater than the distance between the center edge of the discharge cell of the first electrode and the second electrode.

Each of the third electrode and the fourth electrode may have a rear end portion of the rear substrate protruding toward the rear substrate more than the surface of the dielectric layer at the edge of the discharge cell.

The third electrode and the fourth electrode are preferably thicker than the first electrode and the second electrode in the thickness direction of the panel.

A cross section of the third electrode and the fourth electrode cut in a plane perpendicular to the longitudinal direction may have a length longer in a direction perpendicular to the substrate than a length in the direction parallel to the substrate.

A first dielectric layer is formed to cover the first electrode, the second electrode, and the fifth electrode, a second dielectric layer is formed to surround the third electrode and the fourth electrode, and the third electrode and the fourth electrode face each other. Preferably, the thickness of the second dielectric layer formed on the surface of the third electrode and the fourth electrode facing the rear substrate is thicker than the thickness of the second dielectric layer formed on the surface, and the second dielectric layer may be made of an opaque dielectric material. .

The barrier rib includes a barrier member formed along a direction crossing the address electrode, and the first electrode and the second electrode are disposed to pass over the barrier member, and the pair of discharge cells are adjacent in the longitudinal direction of the address electrode. The at least one electrode may be shared, and the third electrode and the fourth electrode may be disposed to pass over the partition member, and a pair of discharge cells adjacent in the longitudinal direction of the address electrode may share at least one electrode. Can be.

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.

2 is a partially exploded perspective view showing a PDP according to an embodiment of the present invention, Figure 3 is a partial plan view schematically showing the structure of the electrode and the discharge cell. 4 is a partial cross-sectional view taken along the line A-A by combining the PDP shown in FIG.

As shown, the PDP according to the present embodiment basically has a predetermined interval between the first substrate 10 (hereinafter referred to as the 'back substrate') and the second substrate 20 (hereinafter referred to as the 'front substrate'). They are disposed to face each other, and a plurality of discharge cells 18 are partitioned by the partition wall 16 in the space between the substrates 10 and 20. In the discharge cell 18, a phosphor layer 19 that absorbs ultraviolet rays and emits visible light is formed along the partition wall and the bottom surface, and discharge gas (eg, xenon (Xe), neon (Ne) to cause plasma discharge. Mixed gas)) is filled.

Address electrodes 12 are formed along one direction (y-axis direction of the drawing) on the opposite surface of the front substrate 20 of the rear substrate 10, and cover the entire address surfaces of the rear substrate 10 while covering the address electrodes 12. A dielectric layer 14 is formed in the. The address electrodes 12 are formed in parallel with each other while maintaining a predetermined distance from neighboring ones.

The partition wall 16 is formed over the dielectric layer 14 formed on the rear substrate 10. In the present embodiment, the partition wall 16 includes a first partition member 16a extending in parallel with the address electrode 12, and It is formed to intersect the first partition member 16b, and consists of a second partition member 16b for partitioning each discharge cell 18 into an independent discharge space, which is not limited to the above-described structure, The partition wall structure of various shapes, such as a stripe-type partition wall structure which consists only of the partition member parallel with an address electrode, can be applied to this invention, This also belongs to the scope of the present invention.

Meanwhile, referring to FIG. 3, the first electrode 21 and the first electrode 21 are formed on the inner surface of the front substrate 20 opposite to the rear substrate 10 along the direction crossing the address electrode 12 (the x-axis direction of the drawing). The two electrodes 22 are formed to extend each other. In the present exemplary embodiment, each of the first electrode 21 and the second electrode 22 extends along a direction crossing the address electrode 12 and corresponds to the bus electrodes 21b and 22 corresponding to each discharge cell 18. And expansion electrodes 21a and 22a extending from the bus electrodes 21 and 22b toward the center of each discharge cell 18 to form a predetermined discharge gap. In this case, the bus electrodes 21b and 22 may be made of metal electrodes, and the enlarged electrodes 21a and 22a may be made of a transparent electrode such as an indium tin oxide (ITO) electrode to secure an aperture ratio.

In this embodiment, each of the first electrode 21 and the second electrode 22 is disposed to pass over the second partition member 16b along the extending direction of the second partition member 16b (the x-axis direction in the drawing). do. Therefore, a pair of adjacent discharge cells in the longitudinal direction of the address electrode (y-axis direction in the drawing) share at least one electrode. That is, each of the first electrode 21 and the second electrode 22 may be commonly used for sustain discharge of a pair of discharge cells adjacent to each other. Each electrode may have a different role depending on the signal voltage applied thereto, and thus the present invention is not limited thereto.

In the present exemplary embodiment, the fifth electrode 25 is disposed between the first electrode 21 and the second electrode 22 so as to correspond to each discharge cell 18. The fifth electrode 25 is a bus electrode 25b extending over the discharge cell 18 in a direction crossing the address electrode 12, and the first electrode 21 and the first electrode 21 from the bus electrode 25b. An enlarged electrode 25a extends toward each of the second electrodes 22. At this time, the enlarged electrode 25a is preferably made of a transparent electrode such as an ITO electrode to secure the aperture ratio, and the bus electrode 25b is preferably made of a metal electrode to ensure high electrical conductivity by compensating for the high resistance of the transparent electrode. Do.

The fifth electrode 25 may be involved in the reset discharge in the reset period, and in the addressing period, is involved in the operation of selecting the discharge cells to be displayed while causing the address discharge between the address electrodes 12. . However, the role thereof may vary depending on the discharge voltage applied to each electrode, and the present invention is not limited thereto.

In this embodiment, since charges are accumulated in the first electrode 21, the second electrode 22, and the fifth electrode 25 by the address discharge between the address electrode 12 and the fifth electrode 25, the charge is retained. In the initial stage of discharge, a short gap discharge allows sufficient discharge even in a state where there are few priming particles. After the initial stage of the sustain discharge, since the long gap discharge occurs between the first electrode 21 and the second electrode 22, stable discharge is possible.

Referring to FIG. 4, the front substrate 20 is spaced apart from the first electrode 21 and the second electrode 22 to form the third electrode 23 and the fourth electrode 24 on the front substrate 20. These third and fourth electrodes 23 and 24 are disposed at positions substantially overlapping with the bus electrodes 21b and 22b of the first and second electrodes when viewed from the front of the panel. Protruding toward the rear substrate 10 in a direction away from the front substrate 20 (21, 22) (negative z-axis direction of the drawing) away from the front substrate (20). The protruding third electrode 23 and the fourth electrode 24 are formed to face each other with a space therebetween, and the space is between the third electrode 23 and the fourth electrode 24 facing each other. Counter discharge can be induced. Preferably, the third electrode 23 and the fourth electrode 24 are made of a metal electrode.

In the present embodiment, the third electrode 23 and the fourth electrode 24 are formed on layers different from those on which the first electrode 21, the second electrode 22, and the fifth electrode 25 are formed. . That is, the first dielectric layer 28a is formed on the front substrate 20 so as to cover the first electrode 21, the second electrode 22, and the fifth electrode 25. The first dielectric layer 28a is formed on the first dielectric layer 28a. The third electrode 23 and the fourth electrode 24 are formed, and the second dielectric layer 28b is formed to surround the third electrode 23 and the fourth electrode 24. In this case, grooves are formed in the center of the discharge cell while extending in the first dielectric layer 28a along the direction crossing the address electrode (x-axis direction in the drawing).

The first dielectric layer 28a may be made of a transparent dielectric material to emit visible light generated in the discharge cell 18 to the outside. The second dielectric layer 28b may be made of the same material as the first dielectric layer 28a. Alternatively, the second dielectric layer 28b may be made of an opaque dielectric material.

As described above, the third electrode 23 and the fourth electrode 24 are formed to protrude, and the second dielectric layer 28b is formed to surround them, and dielectric blocks are formed between the discharge cells 18 adjacent to each other. This dielectric block prevents ions and electrons from moving between neighboring discharge cells 18, thereby significantly reducing crosstalk, and thus reducing misdischarge between on-off cells.

The bus electrodes 21b and 22b of the first electrode 21 and the second electrode 22 each have a direction in which the first electrode 21 and the second electrode 22 extend in the second partition wall member 16b. along the second partition wall member 16b along the x-axis direction, and the third electrode 23 and the fourth electrode 24 are positioned at the address electrode at positions corresponding to the bus electrodes 21b and 22b. It is formed to extend in the direction intersecting with (12). The third electrode 23 and the fourth electrode 24 are formed such that a pair of adjacent discharge cells in the longitudinal direction of the address electrode share at least one electrode. That is, the third electrode 23 and the fourth electrode 24 are formed to pass over the second partition member 16b along the extending direction of the second partition member 16b (the x-axis direction in the drawing). The first electrode 21 and the second electrode 22 are spaced apart from each other with a dielectric layer interposed therebetween.

The MgO protective layer 29 may be formed on the first dielectric layer 28a and the second dielectric layer 28b to protect the dielectric layer from collision of ions of the ionized atoms during plasma discharge. In addition, since the MgO protective layer 29 has a high emission coefficient of secondary electrons when ions collide with each other, the MgO protective layer 29 may also increase discharge efficiency.

In order to drive the PDP according to an embodiment of the present invention, an external voltage may be selected from among the third and fourth electrodes 23 and 24 or the bus electrodes 21b and 22b of the first and second electrodes. Is applied to either. In other words, any one of the third and fourth electrodes 23 and 24 and the bus electrodes 21b and 22b of the first and second electrodes becomes a floating electrode, and at this time, the third and fourth electrodes A potential difference is generated between the electrodes 23 and 24 and the bus electrodes 21b and 22b of the first and second electrodes by capacitive coupling.

5 is a partial cross-sectional view showing in detail the front plate structure of the PDP according to the first embodiment of the present invention.

In this embodiment, in order for the opposite discharge to occur easily between the third electrode 23 and the fourth electrode 24, the end of the rear substrate 20 side of the third electrode 23 (or the fourth electrode 24) is formed. It should protrude further toward the rear substrate 20 than the surface of the first dielectric layer 28a corresponding to the center of the discharge cell 18, and the bus electrodes 21b and 22b of the first electrode 21 and the second electrode 22. It is preferable that the thickness measured in the thickness direction of the panel be thicker than). That is, referring to FIG. 5, the conditions δ1> 0 and H (b) <H (m) are satisfied. Here, δ1 represents the length of the third electrode 23 (or the fourth electrode 24) protruding from the surface of the first dielectric layer 28a, H (b) is a bus measured from the front substrate 20 surface The thickness of the electrodes 21b and 22b is shown, and H (m) represents the thickness which measured the 3rd electrode 23 (or the 4th electrode 24) in the thickness direction of a panel.

In order to manufacture the front plate structure, the dielectric layer surrounding the electrode installed on the front substrate 20 may be dug by sandblasting, or the dielectric layer may be partially cut out by using a photosensitive dielectric or a green sheet. Alternatively, an electrode unit including the third electrode 23 and the fourth electrode 24 is separately manufactured by using a thick film ceramic sheet (TFCS) technique, and then the first electrode 21, the second electrode 22, and the first electrode 21 are formed. It may be manufactured by bonding to the front substrate 20 on which the five electrodes 25 are formed.

The thicker the thickness W (b) of the bus electrodes 21b and 22b and the thickness W (m) of the third electrode 23 (or the fourth electrode 24), or the bus electrodes of the first and second electrodes ( The closer the distance H (mb) between 21b, 22b and the third electrode 23 (or fourth electrode 24), the greater the capacitance between the two electrodes, so that the first and second electrodes on the front substrate 20 are larger. Discharge can be easily transferred from (21, 22) to the third and fourth electrodes (23, 24).

The cross section which cut | disconnected the 3rd electrode 23 and the 4th electrode 24 in the plane perpendicular | vertical to the longitudinal direction, respectively, has a board | substrate surface rather than the length W (m) in the direction parallel to the substrate surface (y-axis direction of drawing). The length H (m) in the vertical direction (z-axis direction in the figure) may be longer. In other words, the height from the front substrate 20 surface of the third electrode 23 and the fourth electrode 24 can be made higher. In this case, when the size of the discharge cell should be reduced in order to implement a high-definition display, the height of the third electrode 23 and the fourth electrode 24 may be increased to compensate for this.

Meanwhile, when the second dielectric layer 28b is formed to surround the third electrode 23 and the fourth electrode 24, as shown in FIG. 5, the third electrode 23 and the fourth electrode 24. The thickness of the second dielectric layer 28b formed on the surface where the third electrode 23 and the fourth electrode 24 face the back substrate 10 rather than the thickness W1 of the second dielectric layer 28b formed on the opposite surface. (H1) is formed thicker. Through this structure, erroneous discharges can be prevented from occurring between electrodes positioned in adjacent discharge cells during sustain discharge.

As described above, grooves are formed in the center of the discharge cell while extending in the first dielectric layer 28a along the direction crossing the address electrode (the x-axis direction of the drawing). Thus, the surface of the first dielectric layer at the edge of the discharge cell protrudes more toward the back substrate than the surface of the first dielectric layer at the center of the discharge cell. When δ2 is defined as the length of the surface of the first dielectric layer 28a protruding from the surface of the first dielectric layer 28a at the center of the discharge cell, an embodiment of the present invention satisfies the condition of δ2> 0. do. In addition, the width W (G) of the groove formed on the first dielectric layer in the direction parallel to the address electrode is greater than the distance W (g) between the center edge of the discharge cell of the first electrode and the second electrode. Is formed larger. That is, the condition of W (g) &lt; W (G) is satisfied. The first dielectric layer 28a may be formed by etching the first dielectric layer at the center of the discharge cell by etching or sandblasting.

In this structure, the thickness of the dielectric layer is thinly formed in the groove of the first dielectric layer 28a, and the thickness of the dielectric layer is thickly formed outside the groove of the first dielectric layer 28a. Accordingly, the capacitance of the first dielectric layer 28a in the groove is greater than the capacitance of the dielectric layer outside the groove. Therefore, where the position of the surface of the first dielectric layer 28a changes, that is, where the thickness of the first dielectric layer 28a changes, the electric field is severely distorted because it varies depending on the capacitance difference of the dielectric layers. This distorted electric field makes it possible to obtain a relatively strong discharge in a region where the discharge path is relatively long, that is, where the thickness of the dielectric changes. This serves to cause a stronger discharge occurs at the edge of the discharge cell.

6A to 6D are partial cross-sectional views schematically illustrating sizes and positions of cathode spots and anode spots with time after discharge starts in a PDP according to an embodiment of the present invention.

After the discharge (D) is started in the region closest between the first electrode 21 and the second electrode 22 formed on the front substrate 20-the center of the discharge cell 18-to accumulate ions and electrons. As a result, the voltage applied to the discharge gap decreases, and accordingly, the cathode spot and the anode spot move to an area without surface charge, that is, an edge area of the discharge cell 18. At this time, the voltage applied to the discharge gap g decreases with time, so that the intensity of the discharge becomes weak (see Figs. 6 (a) and 6 (b)).

In the structure according to the present embodiment, unlike the conventional three-electrode structure in which the discharge is turned off in English, the discharge cell 18 is discharged to the third and fourth electrodes 23 and 24 provided at the edge of the discharge cell 18. This transfers In the third and fourth electrodes 23 and 24, since discharge occurs more easily than the bus electrodes 21b and 22b between the third electrode 23 and the fourth electrode 24 utilizing the opposite discharge. The discharge intensity of is only slightly weaker as compared with the discharge on the surfaces of the bus electrodes 21b and 22b. Discharge is maintained for a long time as the cathode spot and the anode spot move from the top to the bottom of the third and fourth electrodes 23 and 24, and the surface charge is applied to the third and fourth electrodes 23 and 24. After enough accumulation in the dielectric layer, the discharge disappears. (See Fig. 6 (c), (d))

As such, when the two electrodes are the same, the discharge start voltage in the counter discharge electrode structure is much lower than that of the coplanar discharge electrode structure, so that discharge is likely to occur. The discharge transition from the 21 and 22 to the third and fourth electrodes 23 and 24 is easy. Therefore, the light emission efficiency is good and discharge is maintained for a long time in the region having a long discharge path—near the edge of the discharge cell.

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 structure of the electrode involved in the discharge inside the discharge cell has a surface discharge structure at the center of the discharge cell, and has an opposite discharge structure at the edge of the discharge cell. The initiated discharge can be easily transferred to the discharge cell edge electrode. Therefore, the discharge is maintained for a long time near the edge of the discharge cell, which is a region having a long discharge path with good luminous efficiency.

In addition, since grooves are formed in the dielectric layer corresponding to the center of the discharge cell, relatively strong discharge is generated in a region where the discharge path is relatively long, that is, where the thickness of the dielectric is changed. This serves to cause a stronger discharge occurs at the edge of the discharge cell.

In addition, the dielectric layer formed to surround the electrodes constituting the opposite discharge structure forms a dielectric block between discharge cells adjacent to each other, thereby preventing crosstalk from occurring due to preventing ions and electrons from moving between neighboring discharge cells. (on-off) can reduce the mis-discharge between cells.

Claims (10)

A rear substrate and a front substrate disposed to face each other; Address electrodes formed on the rear substrate in parallel in one direction; A partition wall disposed in a space between the rear substrate and the front substrate to partition a plurality of discharge cells; Phosphor layers formed in the discharge cells; First and second electrodes corresponding to each discharge cell while extending in a direction crossing the address electrode on the front substrate; A third electrode and a fourth electrode which are disposed to be spaced apart from the first electrode and the second electrode and protrude toward the rear substrate in a direction away from the front substrate, so as to face each other with a space therebetween; field; Fifth electrodes corresponding to each discharge cell while extending in a direction crossing the address electrode between the first electrode and the second electrode; And A dielectric layer covering the first electrode, the second electrode and the fifth electrode Including, Grooves are formed in a dielectric layer corresponding to the center of the discharge cell, and grooves of the dielectric layers are formed while extending in a direction crossing the address electrode. The method of claim 1, And a width of the dielectric layer measured in a direction parallel to the address electrode is greater than a distance between a center edge of the discharge cell of the first electrode and the second electrode. delete The method of claim 1, The third electrode and the fourth electrode, each end of the back substrate side of the plasma display panel protrudes toward the back substrate more than the surface of the dielectric layer of the edge of the discharge cell. The method of claim 1, The third electrode and the fourth electrode, the thickness of the plasma display panel is thicker than the first electrode and the second electrode measured in the thickness direction of the panel. The method of claim 1, And a cross section of the third electrode and the fourth electrode cut in a plane perpendicular to the longitudinal direction, the length of the third electrode and the fourth electrode in the direction perpendicular to the substrate is longer than the length in the direction parallel to the substrate. The method of claim 1, A first dielectric layer is formed to cover the first electrode, the second electrode, and the fifth electrode, and a second dielectric layer is formed to surround the third electrode and the fourth electrode. And a thickness of the second dielectric layer formed on the surface of the third electrode and the fourth electrode facing the rear substrate is thicker than the thickness of the second dielectric layer formed on the surface of the third electrode and the fourth electrode facing each other. delete The method of claim 1, The partition wall includes a partition member formed along a direction crossing the address electrode, And the first electrode and the second electrode are disposed to pass over the barrier member, and the pair of discharge cells adjacent in the longitudinal direction of the address electrode share at least one electrode. The method of claim 1, The barrier rib includes a barrier member formed along a direction crossing the address electrode, and the third electrode and the fourth electrode are disposed to pass over the barrier member, and a pair of adjacent discharges in the longitudinal direction of the address electrode are formed. A plasma display panel in which cells share at least one electrode.

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