KR20050120487A - Plasma display panel - Google Patents

Abstract

A plasma display panel according to the present invention comprises: an upper substrate; Sustain electrode pairs formed below the upper substrate and having X and Y electrodes spaced apart from each other by a discharge gap; An upper dielectric layer covering the sustain electrode pairs; A lower substrate disposed to face the upper substrate; Address electrodes formed on the lower substrate so as to intersect with the storage electrode pairs; A lower dielectric layer covering the address electrodes; It is formed in the form of a stripe between the upper substrate and the lower substrate, disposed between the address electrodes, the partition wall formed with a phosphor layer therein; and the X electrode and the Y electrode, each extending in parallel and spaced apart A main electrode part having at least two electrode parts and connecting electrode parts connecting the electrode parts, respectively, and an electrode part located at the outermost part of the electrode part forming a discharge gap, wherein cutouts are formed from the outermost edge, respectively. It features.

Description

Plasma display panel {Plasma display panel}

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel capable of ensuring discharge stability.

In general, a plasma display panel applies a predetermined voltage to an electrode in a state where gas is charged between electrodes installed in an enclosed space so that a glow discharge occurs, and the plasma display panel is formed by ultraviolet rays generated during the glow discharge. The phosphor layer formed in the pattern is excited to implement an image.

A plurality of discharge cells are provided in the plasma display panel. In FIG. 1, an example of a cross-sectional structure of a unit discharge cell is illustrated.

Referring to the drawings, in the discharge cell 10, the sustain electrode pair 12 formed of a pair of the X electrode 13 and the Y electrode 14 is formed on the lower surface of the upper substrate 11. The X electrode 13 and the Y electrode 14 serve as a common electrode and a scan electrode, respectively, and are spaced apart from each other by a discharge gap. The X electrode 13 and the Y electrode 14 are each composed of transparent electrodes 13a and 14a and bus electrodes 13b and 14b which are applied to a lower surface thereof to apply a voltage. The sustain electrode pair 12 is embedded by an upper dielectric layer 15, and a protective layer 16 is formed on a lower surface of the upper dielectric layer 15.

The lower substrate 21 is disposed to face the upper substrate 11, and the address electrode 22 is formed on the lower substrate 21 in a direction crossing the storage electrode pairs 12. The address electrode 22 is embedded by the lower dielectric layer 23, and the phosphor layer 24 is formed of a fluorescent material on the lower dielectric layer 23. On the other hand, the discharge gas is inject | poured into the discharge cell 10 comprised in this way.

In the discharge cell 10 having the above structure, when the address voltage is applied between the address electrode 22 and the Y electrode 14 of the sustain electrode 12 and addressed, the discharge starts and the discharge cell 10 Wall charges are formed in the In this state, when the sustain voltage is applied between the X electrode 13 and the Y electrode 14 of the sustain electrode 12, the discharge is maintained. The electric charge is generated by such a discharge, and the electric charges collide with the discharge gas to form a plasma to generate ultraviolet rays. The phosphor layer 24 is excited by the generation of such ultraviolet rays, thereby emitting light.

On the other hand, the sustain electrode provided in the plasma display panel may have a variety of structures, an example of which is shown in FIG.

As illustrated, the barrier ribs 30 are arranged in a stripe shape, and the storage electrode pairs 21 are arranged in a direction crossing the barrier ribs 30. In order to further simplify the manufacturing process and reduce the manufacturing cost, the sustain electrode pair 20 may include a transparent electrode as illustrated in FIG. 1 on the X electrode 21 and the Y electrode 24 constituting the sustain electrode pair 20. Instead of omitting each of these, the bus electrode extends to the region where the transparent electrode is normally disposed.

More specifically, the X electrode 21 includes a main electrode portion 22 including a plurality of electrode portions 22a, 22b, and 22c extending in a direction crossing the partition wall 30, and the electrode portions 22a. (22b) and (22c) is composed of a connecting electrode (23) for connecting. Here, the electrode portions 22a, 22b, and 22c are disposed to be spaced apart from each other so as to secure a predetermined aperture ratio. In addition, like the X electrode 21, the Y electrode 24 is composed of a main electrode portion 25 consisting of a plurality of electrode portions 25a, 25b, 25c, and a connecting electrode portion 26. have. The region in which the storage electrode pairs 20 configured as described above are spaced apart by the discharge gap g corresponds to the discharge region 31 which is a discharge cell in which discharge occurs by crossing the address electrode 40. The boundary region between the portions 20 and the upper region of the partition wall 30 correspond to the non-discharge region 32 in which no discharge occurs.

However, according to the related art, in order to increase the luminance and the aperture ratio, the X electrode and the Y electrode constituting the sustain electrode pair may be disposed at the outermost side of the discharge region. In this case, different discharge regions are arranged on the basis of the non-discharge region. As the proximity between the X electrode and the Y electrode disposed in the field may be close, there may be a problem that the discharge is generated between the adjacent discharge regions.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a plasma display panel in which a stable discharge can be performed by optimally designing a structure of a sustain electrode.

Plasma display panel according to the present invention for achieving the above object,

An upper substrate;

Sustain electrode pairs formed below the upper substrate and having X and Y electrodes spaced apart from each other by a discharge gap;

An upper dielectric layer covering the sustain electrode pairs;

A lower substrate disposed to face the upper substrate;

Address electrodes formed on the lower substrate so as to cross the sustain electrode pairs;

A lower dielectric layer covering the address electrodes;

It is formed in a stripe form between the upper substrate and the lower substrate, disposed between each of the address electrodes, partition walls formed with a phosphor layer therein;

The X electrode and the Y electrode each includes a main electrode part having at least two or more electrode parts extending in parallel and spaced apart from each other, and connecting electrode parts connecting the electrode parts, respectively, and forming an discharge gap. The outermost electrode portion is characterized in that the incisions are formed from the outermost edge, respectively.

The cutouts are preferably disposed at the centers between the partition walls.

The connecting electrode parts may be disposed to correspond to the partition walls, respectively.

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

3 and 4 illustrate a plasma display panel according to an embodiment of the present invention.

3 and 4, in the plasma display panel 100 according to an exemplary embodiment, an upper substrate 111 on which an image is displayed and a lower substrate disposed to face the upper substrate 111 ( 121).

A plurality of sustain electrode pairs 130 are formed and arranged on a surface of the upper substrate 111 facing the lower substrate 121. The sustain electrode pair 130 may include an X electrode 131 and a Y electrode 134. The X electrode 131 may correspond to a common electrode, and the Y electrode 134 may correspond to a scan electrode. The X electrode 131 and the Y electrode 134 will be described in detail later.

The sustain electrode pairs 130 are covered by an upper dielectric layer 112, and the upper dielectric layer 112 is covered by a protective layer 113 formed of MgO or the like.

In the lower substrate 121 facing the upper substrate 111, the address electrodes 122 are formed to intersect the storage electrode pairs 130 on the surface facing the upper substrate 111. The address electrodes 122 are formed in a stripe shape and are covered by the lower dielectric layer 123.

The partition walls 124 are formed on the lower dielectric layer 123 and partitioned into a plurality of spaces 125. The barrier ribs 124 prevent cross talk between the partitioned spaces 125. The barrier ribs 124 are formed in a stripe shape spaced apart at predetermined intervals. Here, one address electrode 122 is disposed between each of the barrier ribs 124, and the barrier ribs 124 extend in parallel with the address electrodes 122, respectively.

The phosphor layer 126 is disposed in the spaces 125 partitioned by the partition walls 124. As shown, the phosphor layer 126 is formed over the side surface of the partition wall 124 and the upper surface of the lower dielectric layer 123 surrounded by the partition wall 124. The phosphor layer 126 forms a phosphor layer of red, green, and blue according to the color of the phosphor composed of red, green, and blue to realize a color screen.

As shown in FIG. 5, the spaces 125 partitioned by the partition walls 124 are provided with a plurality of regions where the storage electrode pairs 130 and the address electrodes 122 cross each other. Intersecting areas correspond to discharge cells 151 as areas where discharge occurs. In contrast, the boundary regions between the storage electrode pairs 130 and the upper regions of the barrier ribs 124 correspond to the non-discharge regions 152 where no discharge occurs.

As described above, the discharge cells 151 in which the discharge occurs are composed of red, green, and blue discharge cells according to the color of the phosphor layer 126. The red, green, and blue discharge cells are disposed adjacent to each other. It is a pixel. The discharge cells 151 are filled with a discharge gas in which neon (Ne), xenon (Xe), and the like are mixed. In this state, the edges of the upper substrate 111 and the lower substrate 121 are filled. The upper substrate 111 and the lower substrate 121 are sealed to each other and bonded to each other by a sealing member such as frit glass formed therein.

On the other hand, the X electrode 131 of the sustain electrode pair 130, as shown in detail in Figures 3 and 5, the main electrode portion 132 consisting of at least two or more electrode portions. The main electrode part 132 is illustrated as being composed of three first, second and third electrode parts 132a, 132b, and 132c, but this is merely an example, and the number of electrode parts is not limited thereto.

The first, second, and third electrode portions 132a, 132b, and 132c each have a predetermined width and length, and are formed to extend in a direction crossing the direction in which the partition walls 124 are formed. Here, the first, second and third electrode portions 132a, 132b and 132c extend in parallel to each other, and the first, second and third electrode portions 132a, 132b and 132c are respectively predetermined. By being spaced apart from each other, an opening is formed between the first electrode portion 132a and the second electrode portion 132b and between the second electrode portion 132b and the third electrode portion 132c, respectively. As the opening is formed in this manner, the discharge area of the X electrode 131 may be reduced and the discharge current may be limited, thereby reducing power consumption. Here, it is preferable that the opening is formed to a size such that the discharge can be easily diffused.

Among the first, second and third electrode portions 132a, 132b, and 132c, the third electrode portion 132c is disposed at the center side of the discharge cell 151, so that the third electrode portion of the Y electrode 134 will be described later. A discharge gap G is formed at 135c and the first electrode part 132a is disposed at the outermost side of the third electrode part 132c, that is, at the edge of the discharge cell 151.

The first, second, and third electrode parts 132a, 132b, and 132c are connected and connected by at least one connection electrode part 133. The connecting electrode portions 133 are integrally formed with the first, second, and third electrode portions 132a, 132b, and 132c, and disposed to correspond to the upper portions of the partition walls 124, respectively, to increase the aperture ratio. will be. As described above, the X electrode 131 including the main electrode part 132 and the connection electrode part 133 may be formed of a metal such as copper (Cu), silver (Ag), aluminum (Al), or the like.

The cutout portion 141 according to an aspect of the present invention has a first electrode portion 132a among the first, second and third electrode portions 132a, 132b, and 132c connected by the connection electrode portion 133 as described above. Are formed. The cutouts 141 are formed to have a predetermined length and width from the edge surface of the non-discharge area 152 side of the first electrode part 132a, respectively. As shown, the cutout 141 has a rectangular shape and is formed to have a width smaller than a gap between inner surfaces of the partition walls 124, but is not limited thereto. The cutouts 141 formed as described above are disposed to correspond to the centers between the partitions 124, respectively.

The Y electrode 134 constituting the sustain electrode 130 pair together with the X electrode 131 having the above structure may have the same structure as the above-described X electrode 131. That is, the Y electrode 134 includes a main electrode portion 135 including first, second and third electrode portions 135a, 135b and 135c, and the first, second and third electrode portions 135a and 135b. At least one connecting electrode 136 for connecting the (135c) to be connected to each other.

The first, second, and third electrode portions 135a, 135b, and 135c have predetermined widths and lengths, respectively, and extend in a direction crossing the direction in which the partition walls 124 are formed. The three electrode portions 135a, 135b, and 135c are parallel to each other and spaced at predetermined intervals, so that the third electrode portions 135a, 135b, and 135c are spaced apart from each other by the first electrode portion 135a and the second electrode portion 135b and between the second electrode portion 135b and the third electrode portion 135b and the third electrode portion 135b. Openings are formed between the electrode portions 135c, respectively. The third electrode part 135c is disposed at the center of the discharge cell 151 to form a discharge gap G with the third electrode part 132c of the X electrode 131. The 135a is disposed at the outermost side from the third electrode portion 135c, that is, at the edge of the discharge cell 151.

The connecting electrode portions 136 connecting the first, second and third electrode portions 135a, 135b and 135c are integrally formed with the first, second and third electrode portions 135a, 135b and 135c. And are arranged to correspond to the upper portions of the partition walls 124, respectively. As described above, the Y electrode 134 including the main electrode unit 135 and the connecting electrode unit 136 may be formed of a metal such as copper (Cu), silver (Ag), aluminum (Al), and the like. The cutouts 142 according to one feature of the present invention are formed in the first electrode part 135a. Like the cutouts 141 of the X electrode 131, the cutouts 142 may have a predetermined length from the edge surface of the non-discharge area 152 of the first electrode part 135a of the Y electrode 134. The cutouts 142 are formed to have a width, and the cutouts 142 are disposed to correspond to the centers between the partitions 124, respectively.

Referring to the operation of the plasma display panel 100 configured as described above is as follows.

First, an address voltage is applied between the Y electrode 134 and the address electrode 122, which are scan electrodes, to generate an address discharge, and as a result of the address discharge, a discharge cell 151 for generating sustain discharge is selected. After the address discharge is performed, if a sustain voltage is alternately applied between the X electrode 131 and the Y electrode 134 disposed in the selected discharge cell 151, as shown in FIG. 4, the X electrode 131 ) And the sustain discharge is started from the discharge gap G between the Y electrode 134 and the Y electrode 134 to diffuse along the electrode surface. Ultraviolet rays are emitted from the discharge gas by the sustain discharge as described above, and the ultraviolet rays excite the phosphor layer 126 formed in the discharge cell 151. As a result, visible light is emitted from the phosphor layer 126 to realize an image.

Meanwhile, according to one feature of the present invention, the first electrode portions 132a and 135a disposed on the non-discharge region 152 side of the X electrode 131 and the Y electrode 134 for each of the sustain electrode pairs 130. Since the cutouts 141 and 142 are formed, the X electrodes 131 of one of the pairs of storage electrodes 130 disposed in different discharge cells 151 with the non-discharge area 152 as a boundary, respectively. And the spacing between the Y electrode 134 of the other storage electrode pair 130 becomes larger than the structure without the cutout.

That is, the first electrode part 135a of the Y electrode 134 which is disposed between the cutout 141 and the non-discharge area 152 formed to be introduced into the first electrode part 132a of the X electrode 131. A gap between the cutouts 142 formed to be introduced into the first electrode part 132a of the X electrode 131 and the first electrode part of the Y electrode 134 where the cutouts 141 and 142 are not formed, respectively. The cutouts 141 and 142 may be each larger by the length of the cut-in than the gap between the 135a. Accordingly, the gap between the X electrode 131 and the Y electrode 134 can be sufficiently secured with the non-discharge area 152 as the boundary. Therefore, in the open structure as shown between the adjacent discharge cells 151, erroneous discharge between adjacent discharge cells 151 can be prevented, so that stable discharge can be executed and good light emission efficiency can be obtained. Can be.

As described above, in the plasma display panel according to the present invention, the distance between the X electrode and the Y electrode disposed with the non-discharge area as a boundary can be sufficiently secured, so that stable discharge can be achieved without erroneous discharge. Accordingly, luminous efficiency can also be improved.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Could be. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

1 is a block diagram of a unit discharge cell according to a conventional example.

2 is a plan view illustrating a structure of a storage electrode pair according to the related art.

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

4 is a cross-sectional view taken along line IV-IV of FIG. 3.

FIG. 5 is a plan view showing the structure of sustain electrode pairs in FIG. 3; FIG.

<Brief description of the major symbols in the drawings>

111.Top substrate 112.Top dielectric layer

121. Lower substrate 122. Address electrode

123. Lower dielectric layer 124 Bulkhead

126 phosphor layer 130 holding electrode pair

131..X electrode 134..Y electrode

141.142 Dissection 151 Discharge cell

152..Non-discharge area

Claims (7)

An upper substrate; Sustain electrode pairs formed below the upper substrate and having X and Y electrodes spaced apart from each other by a discharge gap; An upper dielectric layer covering the sustain electrode pairs; A lower substrate disposed to face the upper substrate; Address electrodes formed on the lower substrate so as to cross the sustain electrode pairs; A lower dielectric layer covering the address electrodes; It is formed in a stripe form between the upper substrate and the lower substrate, disposed between each of the address electrodes, partition walls formed with a phosphor layer therein; The X electrode and the Y electrode each includes a main electrode part having at least two or more electrode parts extending in parallel and spaced apart from each other, and connecting electrode parts connecting the electrode parts, respectively, and forming an discharge gap. Plasma display panel, characterized in that cutouts are formed in the outermost electrode portion from the outermost edge. The method of claim 1, And the cutouts are respectively disposed at centers between the partition walls. The method of claim 1, And the cutouts are formed in a rectangular shape. The method of claim 1, And the connection electrode parts are disposed to correspond to the partition walls, respectively. The method of claim 1, The X electrode and the Y electrode is formed of any one of copper, silver, aluminum and the like. The method of claim 1, And the X electrode and the Y electrode are symmetrical with respect to the center between them. The method of claim 1, And a protective layer is formed on the lower surface of the upper dielectric layer.