KR20080033637A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to decrease light loss due to a second sustain electrode by shortening a discharge path and a light emitting amount per unit. A first substrate(111) and a second substrate(121) are arranged to be opposed to each other. A barrier rib(124) is arranged between the first and second substrates and defines discharge cells, which generate gas discharges with the first and second substrates. First sustain electrodes(112) are elongated along a middle row and include protruded portions, which are elongated to be normal to the elongation direction of the sustain electrodes to correspond to a discharge cell. The middle row is parallel to rows in the discharge cells and arranged between two adjacent rows in the discharge cells. Second sustain electrodes(113) are elongated to correspond to respective rows in the discharge cell and include protruded portions, which are protruded in a direction normal to the elongation direction of the sustain electrodes. Plural address electrodes(122) are arranged to cross the first and second sustain electrodes. A fluorescent layer(125) is arranged in the discharge cells.

Description

Plasma display panel {Plasma display panel}

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

FIG. 2 is a plan view schematically illustrating a positional relationship between the partition wall, the first sustain electrode, the second sustain electrode, and the address electrode of FIG. 1.

3 is a plan view schematically illustrating a positional relationship between a partition wall, a first sustain electrode, a second sustain electrode, and an address electrode of a plasma display panel according to another exemplary embodiment of the present invention.

4 is a plan view schematically illustrating a positional relationship between a partition wall, a first sustain electrode, a second sustain electrode, and an address electrode of a plasma display panel according to another exemplary embodiment of the present invention.

FIG. 5 is a plan view schematically illustrating a positional relationship between a partition wall, a first sustain electrode, a second sustain electrode, and an address electrode of a plasma display panel according to another exemplary embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: plasma display panel 111: first substrate

112: first sustain electrode 113: second sustain electrode

115: first dielectric layer 116: protective film

122: address electrode 123: second dielectric layer

124: bulkhead

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel in which a discharge path is shortened and a unit light emission amount is reduced.

In general, a plasma display panel is a flat panel display panel that realizes a predetermined image by exciting phosphors by ultraviolet rays generated by gas discharge, and is a next-generation thin flat panel display panel that can be thinned and composed of a large screen with high resolution. Be in the spotlight. In order to reduce the power consumption of the plasma display panel, the interval between the sustain electrodes causing sustain discharge must be narrowed, and the condition that the unit emission amount must be small in order to enable fine gray scale expression must be satisfied.

However, in the case of the conventional plasma display panel, there is a problem that the power consumption is high because the discharge voltage is high during the sustain discharge because the interval between the sustain electrodes is wide.

A discharge cell of a plasma display panel, which is a space in which discharge generally occurs, has a rectangular shape in which a cross section parallel to the panel has a long axis and a short axis. In the case of the conventional plasma display panel, the first sustain electrode and the second sustain electrode extend in parallel with the rectangular short axis direction. Then, a protrusion was formed from the first sustain electrode in the direction of the second sustain electrode, and a protrusion was formed from the second sustain electrode in the direction of the first sustain electrode, and discharge was generated between the protrusions. Therefore, since the distance between the protrusion of the first sustain electrode and the protrusion of the second sustain electrode corresponds to the length of the long axis of the discharge cell, there is a problem that the discharge path is long, so that the sustain discharge voltage is high and the power consumption is large. In addition, since the unit emission amount (a light emission amount in one light emission) is large because the sustain discharge voltage is high, there is a problem that it is difficult to express fine gray levels when the gray level is expressed by adjusting the number of light emission times, thereby degrading the quality of the implemented image.

The present invention has been made to solve various problems including the above problems, and an object of the present invention is to provide a plasma display panel in which a discharge path is shortened and a unit light emission amount is reduced.

The present invention provides a gas comprising: (i) a first substrate and a second substrate disposed to face each other; and (ii) a gas disposed between the first substrate and the second substrate, together with the first substrate and the second substrate. Partition walls defining discharge cells in which discharge occurs, and (iii) between rows between odd-numbered rows and even-numbered rows when referred to as a row between a row of discharge cells and a row of discharge cells parallel and adjacent thereto. First storage electrodes extending along rows between any one kind, having protrusions projecting in a direction perpendicular to the extending direction to correspond to each discharge cell, and (iv) extending to correspond to each row of discharge cells, Second storage electrodes having protrusions protruding in a direction perpendicular to the extension direction to correspond to each discharge cell, and (v) a plurality of address electrodes disposed to intersect the first storage electrodes and the second storage electrodes. Field, (vi) The present invention provides a plasma display panel comprising a phosphor layer disposed in the discharge cells.

According to another aspect of the present invention, the protrusions of the first sustain electrodes may be provided to be symmetrical with respect to the extending direction of the first sustain electrodes.

According to another feature of the present invention, the protrusions of each of the first sustain electrodes may be provided to have a + shape with an extension direction portion of each of the first sustain electrodes.

According to another feature of the present invention, the first sustain electrodes may be disposed above the partition wall.

According to another feature of the present invention, the first sustain electrodes may be disposed above the partition wall, and the protrusions of the first sustain electrodes may protrude into the discharge cells.

According to another feature of the present invention, the protrusions of each of the second sustain electrodes may protrude into the discharge cells.

According to another feature of the invention, the protrusions of the second sustain electrodes may be formed of a transparent material.

According to another feature of the present invention, each of the protrusions of the second sustain electrodes may be further provided with a transparent protrusion formed of a transparent material.

According to another feature of the invention, the second sustain electrodes may be formed of a transparent material.

According to another feature of the present invention, the second storage electrodes may be disposed above the partition wall, and the protrusions of the second storage electrodes may protrude into the discharge cells.

According to another feature of the present invention, the protrusions of the two second sustain electrodes adjacent to each of the first sustain electrodes may protrude toward each other.

According to another feature of the present invention, the address electrodes may be provided to correspond to the protrusions of the respective second sustain electrodes.

According to still another feature of the present invention, the cross section parallel to the first substrate of each of the discharge cells may have a rectangular shape.

According to still another feature of the present invention, each of the discharge cells may have an elongated rectangular shape in a direction in which the address electrodes extend.

According to another feature of the present invention, the first sustain electrodes may be electrically connected to each other, and the second sustain electrodes may be electrically connected to each other.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view schematically illustrating a plasma display panel according to an exemplary embodiment of the present invention, and FIG. 2 schematically illustrates a positional relationship between a partition wall, a first sustain electrode, a second sustain electrode, and an address electrode of FIG. 1. It is a top view which shows.

Referring to the drawings, the first substrate 111 and the second substrate 121 are disposed to face each other. The first substrate 111 and the second substrate 121 may be formed of a variety of materials, such as a transparent material such as glass or may be formed of a plastic material. The partition wall 124 is provided between the first substrate 111 and the second substrate 121. In FIG. 1, the partition wall 124 is provided only on an upper surface of the second substrate 121 in the direction of the first substrate 111, but the second substrate 121 is disposed in the direction of the second substrate 121. Various modifications are possible, such as a partition may also be provided on the upper surface.

The partition wall 124 defines discharge cells 126 (see FIG. 2) in which gas discharge occurs along with the first substrate 111 and the second substrate 121. In this case, as shown in FIGS. 1 and 2, the partition wall 124 is limited such that a cross section parallel to the first substrate 111 of each discharge cell has a long axis l and a short axis s. In this case, although each discharge cell is illustrated as having a rectangular shape in FIGS. 1 and 2, the present invention is not necessarily limited thereto, and may have various cross sections such as an ellipse if it has a long axis (L) and a short axis (s). Of course. The same is true in the embodiments to be described later.

Meanwhile, the plasma display panel 100 includes sustain electrodes extending in one direction to correspond to the discharge cells 126. 1 and 2, the first sustain electrode 112 and the second sustain electrode 113 extend in the y direction. Here, the y direction is a direction parallel to the short axis s of the discharge cell 126.

At this time, when a row between discharge rows 126 and one row of parallel and adjacent discharge cells 126 is referred to as an “between rows”, the first sustain electrodes 112 may be even with odd rows. It extends along the rows between any one of the first between rows. In addition, the first sustain electrodes 112 may have protrusions 1121 protruding in a direction (± x direction) perpendicular to the extension direction (y direction) to correspond to each discharge cell 126. 1 and 2, the protrusions 1121 of each first storage electrode 112 are illustrated to be symmetric about an extended direction (y direction) of each first storage electrode 112. That is, in FIG. 1 and FIG. 2, the protrusions 1121 of each first storage electrode 112 are formed to have a + shape with an extension direction portion of each first storage electrode 112. Of course, many other variations are possible.

The first sustain electrode 112 may be provided to correspond to the non-discharge area of the discharge cell 126. Herein, the non-discharge region of the discharge cell 126 means an edge of a portion where no discharge occurs or a portion where the discharge occurs, and for example, an upper portion of the partition wall 124. 1 and 2 illustrate the case where the first storage electrode 112 is provided above the partition wall 124.

The second storage electrodes 113 extend to correspond to each row of the discharge cells 126, and protrude in a direction perpendicular to the extension direction (y direction) (± x direction) to correspond to each discharge cell 126. It has protrusions 1131. At this time, the protrusions 1131 of the second sustain electrode 113 protrude into the discharge cells 126. In addition, the protrusions 1131 of the two second storage electrodes 113 adjacent to each of the first storage electrodes 112 protrude toward each other. In this case, each of the protrusions 1131 of the second storage electrodes 113 may further include a protrusion 1132 formed as shown in FIGS. 1 and 2.

The first sustain electrode 112 and the second sustain electrode 113 may be provided at various positions. In FIGS. 1 and 2, the first sustain electrode 112 and the second sustain electrode 113 may be the first. Although disposed on the surface of the substrate 111 in the direction of the second substrate 121, the present invention is not limited thereto. That is, various modifications are possible, such as the first storage electrode 112 and the second storage electrode 113 may be provided in the partition wall 124. The same is true in the embodiments to be described later.

The first sustain electrode 112 and the second sustain electrode 113 are electrodes for sustain discharge, and sustain discharge for realizing an image of the plasma display panel occurs between the electrodes.

The first sustain electrode 112 and the second sustain electrode 113 may be formed of a conductive metal such as silver, oyster, gold, or aluminum having low resistance and high electrical conductivity. In this case, when light generated in the plasma display panel 100 is emitted to the outside through the first substrate 111, the second storage electrode (eg, the second storage electrode) may be disposed so that there is no element that inhibits the emission of light on the optical path. The protrusion 1132 protruding from the protrusion 1131 of the 113 is preferably formed of a transparent conductive material. For this purpose, a transparent material such as indium tin oxide (ITO) may be used. Meanwhile, the other portions of the first storage electrode 112 and the second storage electrode 113 may have a multilayer structure formed of a material containing a black additive or including a layer formed of a black material, thereby improving contrast. It may be.

The first sustain electrodes 112 and the second sustain electrodes 113 are connected to a connection cable disposed at the edge of the plasma display panel 100 and supplied with power, and thus the first sustain electrodes 112 are electrically connected to each other. The odd-numbered electrodes of the first sustain electrodes 112 may be electrically connected in common, and the even-numbered electrodes may be electrically connected in common. The same applies to the second sustain electrodes 113.

The first sustain electrodes 112 and the second sustain electrodes 113 are covered with the first dielectric layer 115. This is to prevent the first sustain electrodes 112 and the second sustain electrodes 113 from directly energizing each other, and to prevent the charged particles from damaging them by colliding with the sustain electrodes 112 and 113. Such dielectrics include PbO, B ₂ O ₃ and SiO ₂ . When light generated in the plasma display panel 100 is extracted to the outside through the first substrate 111, the first dielectric layer 115 may be formed of a transparent material.

In this case, at least part of the surface of the first dielectric layer 115 is preferably covered by a protective film. In FIG. 1, the entire surface of the first dielectric layer 115 is illustrated by the protective film 116. The protective film 116 is formed by depositing a material such as MgO. In addition to protecting the first dielectric layer 115, the passivation layer also emits secondary electrons to further activate discharge.

Meanwhile, the address electrodes 122 extend in a direction parallel to the major axis ℓ of the discharge cell 126 so as to intersect the first sustain electrodes 112 and the second sustain electrodes 113. That is, the direction in which the address electrodes 112 extend (the x direction) is the long axis (l) direction of the rectangular discharge cell 126.

In this case, the address electrode 122 may be provided to correspond to the protrusion 1131 of the second sustain electrode 113 as shown in FIGS. 1 and 2. In this electrode arrangement structure, an address discharge occurs between at least one of the first sustaining electrode 112 and the second sustaining electrode 113 and the address electrode 122, and then the first sustaining electrode 112 and the first sustaining electrode 112 are formed. This is to cause sustain discharge between the two sustain electrodes 113.

The address electrodes 122 as described above may be disposed on a surface of the second substrate 121 in the direction of the first substrate 111. In this case, the second dielectric layer 123 may be further provided to cover the address electrodes 122 to prevent the charged particles from colliding with the address electrodes 122 and damaging the address electrodes 122 during discharge. The second dielectric layer 123 is preferably formed as a dielectric capable of inducing charged particles. Such dielectrics include PbO, B ₂ O ₃ , SiO _2, and the like.

On the other hand, the phosphor layer 125 is provided inside the discharge cell 126, more specifically, on the upper surface of the second dielectric layer 123 and the side surface of the partition wall 124. The phosphor layer 125 is formed by applying a phosphor paste in which a red phosphor, a green phosphor, and a blue phosphor is mixed, and a phosphor paste mixed with a solvent and a binder to the upper surface of the second dielectric layer 123 and the side surfaces of the partition wall 124. It is then formed by drying and firing it. Examples of the red light emitting phosphor include Y (V, P) O ₄ : Eu, and examples of the green light emitting phosphor include Zn ₂ SiO ₄ : Mn, YBO ₃ : Tb, and the blue light emitting phosphor includes BAM: Eu.

In FIG. 1, although the phosphor layer 125 is disposed on the top surface of the second dielectric layer 123 and the side surface of the partition wall 124, the phosphor layer emits visible light by receiving ultraviolet rays emitted from a discharge gas described later. The position is not limited to the upper surface of the second dielectric layer 123 and the side surface of the partition wall 124, but may be in the discharge cell 126.

The discharge gas may be filled in the discharge cell 126. The discharge gas is, for example, a Ne-Xe mixed gas containing 5% to 15% of Xe, and at least a part of Ne may be replaced with He as necessary. Of course, other gases may be used, and of course, may be maintained in a vacuum if necessary.

As described above, the cross-section parallel to the panel of the discharge cell has a rectangular shape with a long axis and a short axis. In the case of a conventional plasma display panel, the first sustain electrode and the second sustain electrode extend in parallel with the short axis direction of the rectangle. . Then, a protrusion was formed from the first sustain electrode in the direction of the second sustain electrode, and a protrusion was formed from the second sustain electrode in the direction of the first sustain electrode, and discharge was generated between the protrusions. Therefore, since the distance between the protrusion of the first sustain electrode and the protrusion of the second sustain electrode corresponds to the length of the long axis of the discharge cell, there is a problem that the discharge path is long, so that the sustain discharge voltage is high and the power consumption is large. In addition, since the unit emission amount (a light emission amount in one light emission) is large because the sustain discharge voltage is high, there is a problem that it is difficult to express fine gray levels when the gray level is expressed by adjusting the number of light emission times, thereby degrading the quality of the implemented image.

However, in the plasma display panel according to the present exemplary embodiment, as described above, the first storage electrode 112 and the second storage electrode 113 extend in a direction parallel to the short axis s of the discharge cell 126. . The interval between the protrusion 1121 of the first sustain electrode 112 and the protrusions 1131 and 1132 of the second sustain electrode 113 corresponds to the length of the short axis s of the discharge cell 126. The discharge path between the protrusion 1121 of the sustain electrode 112 and the protrusions 1131 and 1132 of the second sustain electrode 113 is relatively shortened. Accordingly, the sustain discharge voltage is lowered, which can significantly reduce the power consumption. In addition, as the sustain discharge voltage is lowered, the sustain discharge voltage can be finely controlled, thereby reducing the unit light emission amount. As the unit light emission amount decreases, when the gray level is expressed by adjusting the number of light emission, fine gray level expression can be expressed, and the quality of the image to be realized can be significantly improved. In addition, the first storage electrode 112 may be disposed in the non-discharge region, thereby preventing the light loss in the process in which the light generated in the discharge cell 126 is taken out.

3 is a plan view schematically illustrating a positional relationship between a partition wall, a first sustain electrode, a second sustain electrode, and an address electrode of a plasma display panel according to another exemplary embodiment of the present invention.

The difference between the plasma display panel according to the present embodiment and the plasma display panel according to the above-described embodiment is the protruding portion 1131 of the second sustain electrode 113. In the case of the plasma display panel according to the above-described embodiment, the second sustain electrode 113 includes a protrusion 1131 and a protrusion 1132 protruding from the protrusion 1131. However, in order to prevent light loss in the extraction process when light is taken out through the first substrate 111, the second storage electrode 113 may have only a single protrusion 1131 as shown in FIG. 3. You may. Even in this case, the discharge path between the protrusion 1121 of the first sustain electrode 112 and the protrusion 1131 of the second sustain electrode 113 corresponds to the short axis s of the discharge cell 126, and thus, relatively. Will be shortened. Accordingly, the sustain discharge voltage is lowered, which can significantly reduce the power consumption. In addition, as the sustain discharge voltage is lowered, the sustain discharge voltage can be finely controlled, and thus, the unit light emission amount is reduced, so that delicate gray scale expression is possible.

In this case, the protrusions 1131 of the second sustain electrodes 113 may be formed of a transparent material, thereby further reducing the light loss in the emission process of the light generated in the discharge cell 126. Of course, if the entirety of the second storage electrodes 113 is formed of a transparent material, the light loss may be further reduced.

However, the second storage electrodes 113 may be formed of an opaque conductive material because the second storage electrodes 113 may be disposed at the edge of the discharge cell 126, and the second storage electrodes 113 may also be formed. This is because the size of the protrusions 1131 may be relatively smaller than the size of the protrusions 1121 of the first storage electrode 112 as necessary. In this case, the manufacturing process of the sustain electrodes can be simplified to reduce the manufacturing cost and lower the defective rate, thereby improving the yield.

4 is a plan view schematically illustrating a positional relationship between a partition wall, a first sustain electrode, a second sustain electrode, and an address electrode of a plasma display panel according to another exemplary embodiment of the present invention.

The plasma display panel according to the present exemplary embodiment differs from the plasma display panel according to the above-described embodiments, in which the first storage electrodes 112 are disposed on the partition wall 124, but the first storage electrodes 112 are separated from each other. The protrusions 1121 may protrude into the discharge cells 126. As a result, the distance between the protrusion 1121 of the first sustain electrode 112 and the protrusion 1131 of the second sustain electrode 113 can be further shortened, thereby further lowering the sustain discharge voltage and thereby significantly reducing power consumption. Will be. In addition, as the sustain discharge voltage is lowered, the sustain discharge voltage can be finely controlled, and thus, the unit light emission amount is reduced, so that delicate gray scale expression is possible.

FIG. 5 is a plan view schematically illustrating a positional relationship between a partition wall, a first sustain electrode, a second sustain electrode, and an address electrode of a plasma display panel according to another exemplary embodiment of the present invention.

The plasma display panel according to the present embodiment differs from the plasma display panel according to the above-described embodiments in that the second storage electrodes 113 are disposed on the partition wall 126, but the second storage electrodes 113 are separated from each other. The protrusions 1131 protrude into the discharge cells 126. By providing the second storage electrodes 113 in this manner, when the light generated in the discharge cell 126 is taken out through the first substrate 111, the light loss by the second storage electrode 113 is reduced. Can be further reduced.

According to the plasma display panel of the present invention made as described above, it is possible to implement a plasma display panel in which the discharge path is shortened and the unit emission amount is reduced.

Although the present invention has been described with reference to the embodiments shown in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (15)

A first substrate and a second substrate disposed to face each other; A partition wall disposed between the first substrate and the second substrate and defining discharge cells in which gas discharge occurs together with the first substrate and the second substrate; When one row of discharge cells is parallel between one row of parallel and adjacent discharge cells, each of the discharge cells extends along the rows between any one of odd-numbered rows and even-numbered rows. First sustain electrodes having protrusions protruding in a direction perpendicular to the extending direction to correspond to the first sustain electrode; Second storage electrodes extending to correspond to each row of discharge cells and having protrusions protruding in a direction perpendicular to the extension direction to correspond to each discharge cell; A plurality of address electrodes disposed to intersect the first sustain electrodes and the second sustain electrodes; And And a phosphor layer disposed in the discharge cells. The method of claim 1, And protrusions of the first sustain electrodes are symmetric about an extended direction of the first sustain electrodes. The method of claim 2, The protrusions of each of the first sustain electrodes are formed to have a + shape with a portion extending in the first sustain electrode. The method of claim 1, And the first sustain electrodes are disposed on the partition wall. The method of claim 1, And the first storage electrodes are disposed above the barrier ribs, and the protrusions of the first storage electrodes protrude into the discharge cells. The method of claim 1, The protrusions of each of the second sustain electrodes protrude into the discharge cells. The method of claim 1, The protrusions of the second sustain electrodes are formed of a transparent material. The method of claim 1, Each protrusion of the second sustain electrodes further includes a transparent protrusion formed of a transparent material. The method of claim 1, And the second sustain electrodes are formed of a transparent material. The method of claim 1, And the second storage electrodes are disposed above the barrier ribs, and the protrusions of the second storage electrodes protrude into the discharge cells. The method of claim 1, And protrusions of two second sustain electrodes adjacent to each of the first sustain electrodes protrude toward each other. The method of claim 1, And the address electrodes are provided to correspond to the protrusions of each of the second sustain electrodes. The method of claim 1, And a cross section parallel to the first substrate of each of the discharge cells has a rectangular shape. The method of claim 13, Wherein each of the discharge cells has a rectangular shape elongated in the direction in which the address electrodes extend. The method according to any one of claims 1 to 14, And the first sustain electrodes are electrically connected to each other, and the second sustain electrodes are electrically connected to each other.

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