KR20080045506A - Plasma dispaly panel - Google Patents

Abstract

A plasma display panel is provided to enhance discharge efficiency by implementing opaque electrodes on an intermediate line between center and end lines of a discharge cell. A plasma display panel includes first and second substrates(201,202), plural discharge electrodes, barrier ribs(214), and plural phosphors(217R,217G,217B). The first and second substrates are formed opposite to each other. The discharge electrodes include a pair of sustain discharge electrodes(203), which are disposed between the first and second substrates, and address electrodes(212) across the sustain discharge electrode pairs. The barrier ribs, which are disposed between the first and second substrates, define discharge cells by forming a pixel based on a triangle formation of plural sub-pixels. The phosphors are formed in the discharge cells. The sustain discharge electrode pairs include a pair of transparent electrodes and a pair of opaque electrodes connected to the transparent electrodes. The opaque electrode is formed on an intermediate line between center and end lines of the discharge cells.

Description

Plasma display panel {plasma dispaly panel}

1 is a configuration diagram showing one pixel in a conventional plasma display panel;

2 is an exploded perspective view of a plasma display panel partially cut out according to an embodiment of the present invention;

3 is a plan view illustrating a state in which the discharge electrode of FIG. 2 is disposed;

4 is a configuration diagram showing one pixel in the panel of FIG. 2;

<Description of Symbols for Major Parts of Drawings>

200 ... plasma display panel 201 ... first substrate

202 ... Second substrate 203 ... Holding discharge electrode pair

204 ... X electrode 205 ... Y electrode

206 ... first transparent electrode 207 ... first opaque electrode

208 ... second transparent electrode 209 ... second opaque electrode

210 dielectric layer 112 protective layer

213 Second dielectric layer 214 Bulkhead

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel in which a structure in which discharge electrodes are disposed to improve discharge efficiency in a delta type structure is improved.

In general, a plasma display panel may be classified into a direct current type and an alternating current type according to a type of driving voltage applied to a discharge cell, for example, a discharge type, and may be classified into a counter discharge type and a surface discharge type according to a configuration of discharge electrodes. .

In the DC plasma display panel, all the discharge electrodes are exposed to the discharge cells, and charges are directly transferred between the corresponding discharge electrodes. On the other hand, in the AC plasma display panel, at least one discharge electrode is embedded in the dielectric layer, and ions and electrons generated by the discharge adhere to the surface of the dielectric layer instead of direct charge transfer between the corresponding discharge electrodes. To form a wall voltage, and to maintain discharge by a sustaining voltage.

In the opposite discharge type plasma display panel, an address electrode and a scan electrode are provided to face each sub pixel, and addressing discharge and sustain discharge are generated between the two electrodes. On the other hand, in the surface discharge plasma display panel, an address electrode and a sustain electrode corresponding to each unit pixel are provided to generate addressing discharge and sustain discharge.

Conventional plasma display panels can be designed in various shapes of the discharge cells partitioned into the partition wall according to the arrangement pattern of the sub-pixel, the representative structure is a structure in which the discharge cells are arranged in an in-line type, And a delta type structure in which discharge cells are arranged in a triangle. In particular, in the delta structure, since the subpixels in which the phosphor layers emitting red, green, and blue light are formed are arranged in triangles, not only the area of the non-light emitting area in the display area can be reduced, but also it is advantageous for high definition display.

1 shows a discharge cell 100 having a delta arrangement in a conventional panel.

Referring to the drawings, the discharge cell 100 is a red discharge cell 101, the adjacent blue discharge cell 102 is arranged side by side in the X direction of the substrate, the red discharge cell 101, The green discharge cells 103 are arranged in rows with respect to the blue discharge cells 102.

As described above, in the conventional case, two subpixels are arranged side by side horizontally, and one subpixel is arranged on either one of the upper and lower portions of the two subpixels to form one pixel arranged in a triangular pattern. In order to have the pattern, the partition 104 partitioning the discharge cell 100 has a hexagonal cross section.

In this case, a sustain discharge electrode pair 105 is disposed on the partition wall 104 to perform sustain discharge for each discharge cell 100 along the X direction of the substrate, and the sustain discharge electrode pair 105 is an X electrode. 106 and a Y electrode 107 disposed opposite thereto. In addition, the address electrode 108 is disposed in the direction crossing the sustain discharge electrode pair 105.

In the conventional plasma display panel having the above structure, when an electrical signal is applied to the address electrode 108 and the Y electrode 107, the discharge cells 100 for emitting light are selected, and the plurality of sustain discharge electrode pairs 105 are provided. When an electrical signal is alternately applied), visible light is emitted from the phosphor of the phosphor layer applied in the selected discharge cell 100 to realize a still image or a moving image.

However, since the discharge cell 100 has a delta type structure, the interval between the address electrodes 108 disposed in the red, green, and blue discharge cells 101 to 103 becomes narrow. As a result, the power consumption of the address electrode 108 is greatly increased. Accordingly, the distance between the address electrodes must be widened by changing the pattern of the discharge cells in the delta array.

In addition, the sustain discharge electrode pair 105 is made of an opaque metal material having excellent electrical conductivity, and can be disposed in the discharge cell according to the pattern of the discharge cells having the delta type arrangement. When the opaque electrode is disposed in the discharge cell, visible light is reduced.

As such, the discharge cells of the delta array should be considered as follows.

First, in one pixel, the distance between address electrodes must be widened.

Second, in one discharge cell, the effect of reducing the visible light varies depending on the position where the opaque electrodes are arranged in the discharge cell, and in the high-definition discharge cell, the distance between adjacent discharge cells is narrowed. Should be considered

Third, the possibility of crosstalk between neighboring discharge cells should be reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and to provide a plasma display panel in which the discharge efficiency is improved by widening the interval between the address electrodes and specifying the positions of the sustain discharge electrode pairs in the discharge cells having the delta array. The purpose is.

In order to achieve the above object, the plasma display panel according to an aspect of the present invention,

A first substrate;

A second substrate disposed to face the first substrate;

A plurality of discharge electrodes having a pair of sustain discharge electrode pairs disposed between the first substrate and the second substrate and address electrodes disposed in a direction crossing the sustain discharge electrode pairs;

A partition wall disposed between the first substrate and the second substrate and having a plurality of subpixels arranged in a triangular shape to form one pixel to partition a discharge cell;

A plurality of phosphor layers formed in the discharge cells;

The sustain discharge electrode pair is composed of a pair of transparent electrodes and a pair of opaque electrodes electrically connected to the respective transparent electrodes,

The opaque electrode is characterized in that disposed in the middle line of the center line of the discharge cell and the end line of the discharge cell.

In addition, the transparent electrode is characterized in that protrudes in the same width on both sides of the discharge cell around the opaque electrode.

In addition, subpixels in which phosphor layers emitting light of different colors are arranged in a row along one direction of the substrate, and subpixels in which phosphor layers emitting light of different colors alternate with the subpixels in other adjacent columns are formed. These pixels are alternately arranged to form one pixel.

Furthermore, the opaque electrode disposed on the subpixel in which the phosphor layer emitting light in one color is formed has a middle line between the center line and the end line of the discharge cell of the subpixel in which the phosphor layer emitting light in another color adjacent to the other column is formed. Extend across.

In addition, the pixel includes three subpixels in which red, green, and blue phosphor layers are formed, and two sustain discharge electrode pairs are disposed in one pixel.

Further, the sustain discharge electrode pair includes an X electrode and a Y electrode for performing sustain discharge, and the X electrode or the Y electrode of the pair of sustain discharge electrode pairs, or a row of sub-layers in which a phosphor layer emits light in one color is formed. And the pixels and the sub-pixels of different columns of rows formed with phosphor layers emitting light in different colors adjacent thereto.

In addition, the transparent electrode is characterized in that a portion protruding from the opaque electrode with a predetermined width between the opaque electrode and the partition wall is formed.

Hereinafter, a plasma display panel according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 illustrates a partial cutaway view of a three-electrode alternating surface discharge plasma display panel 200 according to an embodiment of the present invention, and FIG. 2 illustrates a state in which the discharge electrodes of FIG. 1 are disposed.

1 and 2, the plasma display panel 200 includes a first substrate 201 and a second substrate 202 disposed to face the first substrate 201. The first substrate 201 and the second substrate 202 are coated with frit glass (not shown) along the edges of the inner surfaces facing each other to seal the internal discharge cells from the outside.

The first substrate 201 is made of a transparent substrate, for example, soda lime glass. Alternatively, the first substrate 201 may use a translucent plate, a colored substrate, a reflecting plate, or the like.

On the inner surface of the first substrate 201, an X electrode 204 and a Y electrode 205, which are sustain discharge electrode pairs 203, are disposed along the X direction of the panel 200. The X electrode 204 and the Y electrode 205 are alternately arranged along the Y direction of the panel 200. The X electrode 204 includes a first transparent electrode 206 and a first opaque electrode 207 stacked with the first transparent electrode 206, and the Y electrode 205 includes a second transparent electrode ( 208 and a second opaque electrode 209 stacked with the second transparent electrode 208.

In addition, a region between the pair of X and Y electrodes 204 and 205 and the pair of X and Y electrodes 204 and 205 adjacent thereto corresponds to a non-discharge region, and contrast is provided to the non-discharge region. A black stripe layer can be further formed to improve.

The X electrode 204 and the Y electrode 205 are embedded by the first dielectric layer 210. The first dielectric layer 210 may be made of a highly dielectric material, for example, ZnO—B ₂ O ₃ —Bi ₂ O ₃ . The first dielectric layer 210 may be selectively formed only at a portion where the sustain discharge electrode pair 203 is formed, or may be formed over the entire area of the surface of the first substrate 201.

A protective layer 211 such as magnesium oxide (MgO) is deposited on the surface of the first dielectric layer 210 to prevent its breakage and to increase secondary electron emission.

The second substrate 202 may also be made of substantially the same material as the first substrate 201. An address electrode 212 is disposed on an inner surface of the second substrate 202. The address electrode 212 is disposed in a direction crossing the sustain discharge electrode pair 203. The address electrode 212 is buried by the second dielectric layer 213. The second dielectric layer 213 is made of a highly dielectric material, such as PbO-B ₂ O ₃ -SiO ₂ .

A partition wall 214 is formed between the first substrate 201 and the second substrate 202 to partition the discharge cells together. The partition wall 214 includes a first partition wall 215 disposed in the X direction of the panel 200, and a second partition wall 216 disposed in the Y direction of the panel 200. The first partition wall 215 integrally extends in a direction facing each other from a pair of adjacent second partition walls 216. The discharge cell defined by the partition wall 214 is rectangular in cross section.

Meanwhile, in the discharge cells defined by the combination of the first substrate 201, the second substrate 202, and the partition wall 214, neon (Ne) -xenon (Xe) or helium (He) -xenon (Xe). Discharge gas is injected.

Further, a red phosphor layer 217R, a green phosphor layer 217G, and a blue phosphor layer 217B are formed in the discharge cell to be excited by ultraviolet rays generated from the discharge gas to emit visible light. The red, green, and blue phosphor layers 217R, 217G, and 217B may be coated on any area of the discharge cell. In this embodiment, the inner surface of the second substrate 202 and the partition wall 214 may be formed. It is applied to the inner wall in a predetermined thickness.

In addition, the phosphor layer is composed of a red phosphor layer 217R, a green phosphor layer 217G, and a blue phosphor layer 217B, but is not necessarily limited thereto, and may be replaced with a phosphor layer having a different color, or It is possible to additionally form a phosphor layer of color. In the present embodiment, the red phosphor layer 217R is made of (Y, Gd) BO ₃ ; Eu ⁺³ , the green phosphor layer 217G is made of Zn ₂ SiO ₄ : Mn ²⁺ , and the blue phosphor layer ( 217B) preferably consists of BaMgAl ₁₀ O ₁₇ : Eu ²⁺ .

Here, in the discharge cell partitioned by the partition wall 214, a plurality of subpixels are arranged in a triangular shape to form one pixel, and the sustain discharge electrode pair 203 is formed by stacking a transparent electrode and an opaque electrode. The electrically connected, opaque electrode is disposed at a particular position in the discharge cell.

In more detail with reference to Figure 4 as follows.

Hereinafter, the same reference numerals as in the previous drawings refer to the same member having the same function, and one pixel will be described by way of example.

Referring to the drawings, the discharge cells partitioned by the partition wall 214 are discharge cells of the first column 401 adjacent to each other along the Y direction of the panel 200, and discharges of the second column 402 adjacent thereto. The cells are not in the same position but are in a delta type that is offset from each other.

That is, two sub-pixels 403 and 404 in which the red phosphor layer 217R and the blue phosphor layer 217B are disposed in the first column 401 along the Y direction of the panel 200. In the neighboring second column 402, one subpixel 405 having the green phosphor layer 217G is disposed.

In this case, the subpixel 405 having the green phosphor layer 217G disposed in the second column 402 includes the subpixel 403 having the red phosphor layer 217R disposed in the first column 401 and blue. The three sub pixels 403 to 405 are arranged in a triangular shape at positions where the sub pixels 404 on which the phosphor layer 217B is formed are in contact with each other, and half of them.

In the present exemplary embodiment, one pixel has a structure in which the subpixels 403 to 405 are arranged in a triangular shape, and are repeatedly patterned over the entire area of the panel 200.

For example, the subpixel 403 in which the red phosphor layer 217R is formed, the sub pixel 404 in which the blue phosphor layer 217B is formed, and the sub in which the green phosphor layer 217G is formed along the first column 401 are formed. The pixel 405 is repeatedly patterned and has a green phosphor layer at one-half points of two sub-pixels that emit light of different colors in the first column 401 along the adjacent second column 402. The subpixel 405 in which 217G is formed, the subpixel 403 in which the red phosphor layer 217R is formed, and the subpixel 404 in which the blue phosphor layer 217B is formed are located. 405 is arranged in a triangle to form one pixel.

In addition, although the discharge cell partitioned by the partition wall 214 has a quadrangular cross section, various embodiments, such as a triangle, a hexagon, and other polygons, a circular, an ellipse, etc. can exist in addition to a quadrangular cross section.

At this time, the first transparent electrodes 206a, 206b, and 206c are disposed in the discharge cells. The second transparent electrodes 208a, 208b, and 208c are disposed in the discharge cell in the Y electrode 205. The first transparent electrodes 206a, 206b, and 206c and the second transparent electrodes 208a, 208b, and 208c are independently arranged in pairs in the discharge cells and have a rectangular cross section. It is not limited to this. The first transparent electrodes 206a, 206b and 206c and the second transparent electrodes 208a, 208b and 208c are spaced apart from each other from the center of the discharge cell to maintain a discharge gap. .

Meanwhile, the first transparent electrodes 206a, 206b and 206c and the second transparent electrodes 208a, 208b and 208c are made of a transparent material, for example, an ITO film, to improve the opening ratio of the discharge cell. .

Further, in the X electrode 204, first opaque electrodes 207a and 207b are disposed in the discharge cells along the X direction of the panel. The first opaque electrodes 207a and 207b are stacked with the first transparent electrodes 206a, 206b and 206c. In the Y electrode 205, second opaque electrodes 209a and 209b are disposed in the discharge cell along a direction parallel to the first opaque electrodes 207a and 207b. The second opaque electrodes 209a and 209b are stacked with the second transparent electrodes 208a, 208b and 208c.

The first opaque electrodes 207a and 207b and the second opaque electrodes 209a and 209b are arranged in pairs for each discharge cell and are formed in a stripe shape, but are not necessarily limited thereto. The first opaque electrodes 207a and 207b, the second opaque electrodes 209a and 209b are the first transparent electrodes 206a, 206b and 206c, and the second transparent electrodes 208a and 208b. In order to reduce the resistance of 208c, a conductive material having excellent electrical conductivity, such as silver, gold, platinum, copper, chromium, aluminum, iron, or a mixture of two or more thereof is preferable.

On the other hand, in each discharge cell, the address electrodes 212a and 212b are arranged in the direction crossing the X electrode 204 and the Y electrode 205, and the address electrodes 212a and 212b are arranged in the first column. 401 and the adjacent discharge cells of the second column 402 are extended.

At this time, the first opaque electrodes 207a and 207b and the second opaque electrodes 209a and 209b are disposed in the middle line between the center of the discharge cell and the end line of the discharge cell. That is, when the subpixel 405 having the green phosphor layer 217G is described as an example, the second opaque electrode 209a is halfway between the center line C0 of the subpixel 405 and one end line C1. It extends in parallel with the line C2.

The second transparent electrode 208c laminated with the second opaque electrode 209a protrudes in the same width on both sides of the discharge cell 405 around the second opaque electrode 209a. Similarly, the first transparent electrode 206c stacked with the first opaque electrode 206c also has a discharge cell 405 around the first opaque electrode 207b at a position opposite to the second transparent electrode 208c. Protrude in the same width on both sides.

In addition, the second opaque electrode 209a passing through the C2 line extends across the middle of C0 and C1 of the subpixel 404 on which the blue phosphor layer 217B, which is alternately adjacent to each other, is formed. That is, the second opaque electrode 209a disposed in the subpixel 405 on which the green phosphor layer 217G is formed has a center line and an end line of the subpixel 404 on which the blue phosphor layer 217B of another column adjacent thereto is formed. It extends across the midline. At this time, the deviation of the middle line due to the partition wall 214 can be arbitrarily changed by adjusting the size of the sub-pixel.

As such, the second transparent electrode 208a of the subpixel 404 having the blue phosphor layer 217B is formed on the second opaque electrode 209a, and the second transparent electrode of the subpixel 405 having the green phosphor layer 217G formed therein. The electrodes 208c are stacked on the same line.

Further, the first opaque electrode 206b has a first transparent electrode 206b of the subpixel 403 having the red phosphor layer 217R formed thereon, and the first transparent electrode of the subpixel 405 having the green phosphor layer 217G formed therein. The electrodes 206c are stacked on the same line.

Meanwhile, the first transparent electrode 206a of the subpixel 405 having the blue phosphor layer 217B is formed on the first opaque electrode 207a by protruding to both sides of the first opaque electrode 207a with the same width. The second transparent electrode 208b of the subpixel 403 having the red phosphor layer 217R is formed on the second opaque electrode 209b by protruding to both sides of the second opaque electrode 209b with the same width. have.

The arrangement of the first transparent electrodes 206a, 206b, and 206c and the second transparent electrodes 208a, 208b, and 208c is performed by the three subpixels 403, 404, and 405 arranged in a triangle. This is possible because of the arranged delta pixel structure.

Accordingly, in the three sub-pixels emitting three colors of red, green, and blue, the first opaque electrodes 207a and 207b and the first transparent electrodes 206a, 206b, and 206c stacked thereon are provided. The Y electrode (204), the second opaque electrode 209a, the second opaque electrodes 209a and 209b, and the second transparent electrodes 208a, 208b and 208c stacked thereon. 205) only two pairs are needed.

In addition, the address electrode 212a includes a subpixel 403 in which the red phosphor layer 217R is disposed adjacent to the first column 401, and a subpixel 404 in which the blue phosphor layer 217B is formed. Since it extends across, it contributes to light emission of two colors.

The operation of the plasma display panel 100 having the above structure will be described with reference to FIGS. 2 to 4.

First, when a predetermined pulse voltage is applied between the Y electrode 205 and the address electrode 212, the discharge cell to emit light is selected. Wall charges are accumulated on the inner surface of the selected discharge cell.

Subsequently, when a voltage of “+” is applied to the X electrode 204 and a voltage higher than this is applied to the Y electrode 205, the voltage difference applied between the X electrode 204 and the Y electrode 205 is applied. Wall charge is moved by this.

The movement of the wall charges causes a discharge while colliding with the discharge gas atoms in the discharge cell, thereby generating a plasma, which discharges between the first transparent electrode 206 and the second transparent electrode 208 where a strong electric field is formed. It extends from the gap to the edge of the discharge cell.

In this manner, after the discharge is formed, when the voltage difference between the X electrode 204 and the Y electrode 205 becomes lower than the discharge voltage, the discharge no longer occurs, and the space charge and the wall charge are discharged to the discharge cell. Is formed.

At this time, if the polarities of the voltages applied to the X electrode 204 and the Y electrode 205 are changed to each other, the discharge will be generated again with the help of the wall charge. In this way, when the polarities of the X electrode 204 and the Y electrode 205 are reversed, the initial discharge process is repeated. The discharge is stably generated while repeating the above process.

On the other hand, the ultraviolet rays generated by the discharge excite the phosphors of the red, green, and blue phosphor layers 217R, 217G, and 217b applied to the respective discharge cells. Visible light is obtained through the above process. The generated visible light is emitted to the discharge cells to implement a still image or a moving picture.

In this case, two subpixels 403 and 404 are positioned side by side along the first column 401 of the panel 200, and one subpixel 405 is adjacent to the first column 401. The two sub-pixels 403 and 404 are in contact with each other along the 402, and are arranged in a triangular shape at positions 1/2 of them, so that two sustain discharge electrode pairs 203 are arranged in one pixel. Thus, sustain discharge is performed, and one address electrode 212a contributes to light emission of the two subpixels 403 and 404.

As described above, the plasma display panel of the present invention can obtain the following effects.

First, as the opaque electrode is disposed at the center line and the end line of one discharge cell, the efficiency of discharge is increased. This reduces the likelihood of crosstalk occurring.

Second, the transparent gap is formed from the opaque electrode to the discharge gap where the discharge occurs, so that the transmittance of visible light can be improved.

Third, since the transparent electrode also protrudes from the opaque electrode to partition the discharge cell, visible light generation of the phosphor layer applied inside the partition can be maximized.

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

Claims (13)

A first substrate; A second substrate disposed to face the first substrate; A plurality of discharge electrodes having a pair of sustain discharge electrode pairs disposed between the first substrate and the second substrate and address electrodes disposed in a direction crossing the sustain discharge electrode pairs; A partition wall disposed between the first substrate and the second substrate and having a plurality of subpixels arranged in a triangular shape to form one pixel to partition a discharge cell; A plurality of phosphor layers formed in the discharge cells; The sustain discharge electrode pair is composed of a pair of transparent electrodes and a pair of opaque electrodes electrically connected to the respective transparent electrodes, And the opaque electrode is disposed at a middle line between the center line of the discharge cell and the end line of the discharge cell. The method of claim 1, And the transparent electrode protrudes in the same width on both sides of the discharge cell with respect to the opaque electrode. The method of claim 1, Subpixels in which phosphor layers emitting light of different colors are alternately arranged in a row along one direction of the substrate, and subpixels in which phosphor layers emitting light of different colors alternate with the subpixels are alternately arranged in other adjacent columns. Plasma display panel, characterized in that arranged in one pixel. The method of claim 3, wherein The opaque electrode disposed on the subpixel on which the phosphor layer emitting light of one color is formed crosses the center line of the discharge cell of the subpixel on which the phosphor layer emitting light of another color is adjacent to the middle line between the end line and the end line. And a plasma display panel. The method of claim 1, And the pixel includes three subpixels having red, green, and blue phosphor layers formed thereon, and one pixel includes two sustain discharge electrode pairs. The method of claim 5, wherein The sustain discharge electrode pair includes an X electrode and a Y electrode for performing sustain discharge, The X electrode or the Y electrode of the pair of sustain discharge electrode pairs includes a series of subpixels in which a phosphor layer emits light in one color and a subpixel in another column in which phosphor layers emit light in a neighboring color. And a plasma display panel. The method of claim 5, wherein And the address electrode extends across a plurality of subpixels in which a phosphor layer of two colors is formed in one pixel. The method of claim 1, The discharge cell partitioned by the partition wall is a plasma display panel, characterized in that the cross section is rectangular, but hexagonal. The method of claim 1, And said transparent electrode is an ITO film. The method of claim 1, And the transparent electrode has a rectangular shape. The method of claim 1, And the opaque electrode is silver, gold, platinum, copper, chromium, aluminum, iron, or a metal material in which two or more thereof are mixed. The method of claim 1, And the opaque electrode has a stripe shape. The method of claim 2, And wherein the transparent electrode has a portion protruding from the opaque electrode with a predetermined width between the opaque electrode and the partition wall.

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