KR20060087634A - Plasma display panel - Google Patents

Abstract

A plasma display panel is disclosed. The present invention includes a front panel; a rear panel disposed in parallel therewith; a plurality of discharge electrodes disposed on the plurality of panels and to which a predetermined discharge voltage is applied; A partition wall defining a discharge cell; and a red, green, and blue phosphor layer applied in an asymmetric discharge cell; wherein the arrangement of the phosphor layer applied to one pixel and another adjacent pixel is formed differently. The number of times the phosphor layer applied in the discharge cell is repeated is reduced. Accordingly, during driving, the resonant vibration caused by the phosphor layer applied in the discharge cell is broken, thereby reducing noise.

Description

Plasma display panel {Plasma display panel}

1 is a cross-sectional view illustrating a conventional plasma display panel;

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

3 is a plan view illustrating the plasma display panel of FIG. 2;

4 is a plan view showing a plasma display panel according to a second embodiment of the present invention;

<Description of Symbols for Major Parts of Drawings>

200 ... plasma display panel 210 ... front panel

211 ... Front substrate 212 ... X electrode

213 Y electrode 214 Front dielectric layer

215 ... Protective layer 260 ... Back panel

261 Back panel 262 Address electrode

263 back dielectric layer 264 bulkhead

270 bulkhead

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 in which a discharge cell is asymmetrically formed and red, green, and blue phosphor layers are arranged in a specific order to reduce noise.

In general, a plasma display panel injects a discharge gas between two substrates on which a plurality of discharge electrodes are formed, and discharges the discharge, and excites the fluorescent material of the phosphor layer by the ultraviolet rays generated thereby to implement desired numbers, letters, or graphics. A flat display device is referred to.

Referring to FIG. 1, the conventional three-electrode surface discharge plasma display panel 100 is alternately disposed on the front substrate 101, a rear substrate 102 disposed in parallel with the front substrate 101, and an inner surface of the front substrate 101. The X and Y electrodes 103 and 104, the front dielectric layer 105 filling the X and Y electrodes 103 and 104, and the protective film layer 106 deposited on the surface of the front dielectric layer 105. And an address electrode 107 formed on an inner surface of the rear substrate 102 and disposed in a direction crossing the X and Y electrodes 103 and 104, and a back dielectric layer filling the address electrode 107. 108, a partition wall 109 disposed on the rear dielectric layer 108, and a red, green, and blue phosphor layer 110 applied to the inner side of the partition wall 109.

Referring to the operation of the plasma display panel 100 having such a structure, a discharge cell is selected by applying an electrical signal to the Y electrode 104 and the address electrode 107 and then the X and Y electrodes 103 and 104. By alternately applying an electrical signal, surface discharge occurs from the surface of the front substrate 101 to generate ultraviolet rays, and visible light is emitted from the phosphor layer 110 of the selected discharge cell, thereby realizing a still image or a moving image.

However, in the conventional plasma display panel 100, since the color temperature of the blue phosphor layer is low, it is intended to compensate for this by expanding the area of the portion. In this case, since the phosphor layer 110 is repeatedly disposed in the order of red, green, blue, red, green, and blue in the adjacent discharge cells, there is a problem that noise is increased by repetitive resonance vibration.

The present invention is to solve the above problems, to provide a plasma display panel for reducing the noise caused by resonance vibration by changing the arrangement structure of the red, green, blue phosphor layer applied to the adjacent discharge cells. There is this.

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

Front panel;

A rear panel disposed in parallel with the front panel; and

A plurality of discharge electrodes disposed on the front or rear panel and to which a predetermined discharge voltage is applied;

A partition wall disposed between the front and rear panels to define discharge cells of different sizes; and

It includes; red, green, blue phosphor layer applied in the asymmetric discharge cell, and

The arrangement of the phosphor layer applied to one pixel and the other adjacent pixel is formed differently.

In addition, the area of the discharge cells to which the blue phosphor layer is applied is relatively larger than the area of the discharge cells to which the red and green phosphor layers are applied.

In addition, the first red, the first green, and the first blue phosphor layer is applied to one pixel, and the second adjacent red, second blue, and the second green phosphor layer is coated. .

Further, the phosphor layer is repeatedly applied in the order of the first red, the first green, the first blue, the second red, the second blue, the second green in the discharge cells disposed adjacent to one direction of the panel. It is done.

In addition, a phosphor layer of a first red color, a first green color, and a first blue color is applied to one pixel, and a phosphor layer of a second green, second blue, and second red color is applied to another pixel adjacent thereto. .

Further, the phosphor layer is repeatedly applied in the order of the first red, the first green, the first blue, the second green, the second blue, and the second red in discharge cells disposed adjacent to one direction of the panel. It is done.

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

2 illustrates a partial cutting of the plasma display panel 200 according to an exemplary embodiment of the present invention.

Referring to the drawings, the plasma display panel 200 includes a front panel 210 and a rear panel 260 disposed to face the front panel 210, and the front and rear panels 210 and 260. ) Is sealed by frit glass applied along the edge of the opposing face.

The front panel 210 is provided with a transparent front substrate 211, for example, soda lime glass. The X electrode and the Y electrode 212 and 213 are disposed on the bottom surface of the front substrate 211 along the X direction of the substrate 211. The X and Y electrodes 212 and 213 are alternately arranged along the Y direction of the substrate 211.

The X electrode 212 includes a first transparent electrode line 212a formed on an inner surface of the front substrate 211 and a first bus electrode line 212b electrically connected to the first transparent electrode line 212a. Doing. On the inner sidewall of the first transparent electrode line 212a, a first protrusion 212c protrudes to a predetermined size toward the Y electrode 213. The first protrusion 212c is disposed for each discharge cell. The first bus electrode line 212b is disposed along one edge of the first transparent electrode line 212a.

The Y electrode 213 is substantially the same shape as the X electrode 212, and is electrically connected to the second transparent electrode line 213a and the second transparent electrode line 213a formed on the inner surface of the front substrate 211. And a second bus electrode line 213b connected thereto. The second protrusion 213c protrudes toward the X electrode 212 at a predetermined size from the inner sidewall of the second transparent electrode line 213a. The second protrusion 213c is also disposed for each discharge cell in a state in which a discharge gap is formed with the first protrusion 212c. The second bus electrode line 213c is disposed along one edge of the second transparent electrode line 213a.

The first and second transparent electrode lines 212a and 213a and the first and second protrusions 212c and 213c protruding from the first and second transparent electrode lines 212a and 213a may be formed of a transparent conductive film, for example, to improve the opening ratio of the front substrate 211. It consists of an ITO film (Indium Tin Oxide Film). The first and second bus electrode lines 212b and 213b may be formed of a metal material having high conductivity, such as silver, to reduce line resistance of the first and second transparent electrode lines 212a and 213a and to improve electrical conductivity. Ag paste or chromium-copper-chromium alloy.

In this case, the space between the pair of X and Y electrodes 212 and 213 and the pair of X and Y electrodes 212 and 213 adjacent to each other corresponds to a non-discharge area. In the non-discharge region, a black stripe layer may be further formed to improve contrast.

The X and Y electrodes 212 and 213 are embedded by the front dielectric layer 214. The front dielectric layer 214 is made of a highly dielectric material such as ZnO—B ₂ O ₃ —Bi ₂ O ₃ . The front dielectric layer 214 may be selectively printed only on a portion where the X and Y electrodes 212 and 213 are formed, or may be front printed on the entire area of the lower surface of the front substrate 211. A protective film layer 215 such as magnesium oxide (MgO) is deposited on the surface of the front dielectric layer 214 to prevent its breakage and to increase secondary electron emission.

The back panel 261 is provided on the back panel 260, and the back substrate 261 is made of substantially the same material as the front substrate 211. The address electrode 262 is disposed on the back substrate 261. The address electrode 262 is disposed in a direction crossing the X and Y electrodes 212 and 213. The address electrode 262 is embedded by the back dielectric layer 263. The back dielectric layer 263 is made of a highly dielectric material, such as PbO-B ₂ O ₃ -SiO ₂ .

Meanwhile, partition walls 264 are formed between the front and rear panels 210 and 260 to partition a discharge space together with the front and rear panels 210 and 260. The partition wall 264 includes a first partition wall 264a disposed in a horizontal direction crossing the address electrode 262, and a second partition wall 264b disposed in a vertical direction parallel to the address electrode 262. . The first partition wall 264a extends from the inner wall to the inner wall of the pair of adjacent second partition walls 264b to form a matrix.

Alternatively, the partition wall 264 may have a meander type, a stripe type, a honeycomb type, a delta type, or a waffle type in addition to the matrix type. Various types of embodiments exist, and thus, the divided discharge cells are not limited to any one of the discharge spaces such as polygons, circles, ellipses, etc. in addition to quadrangles.

Meanwhile, discharges such as neon (Ne) -xenon (Xe) or helium (He) -xenon (Xe) are formed in the discharge cells partitioned by the front and rear panels 210 and 260 and the partition wall 264. Gas is injected.

In the discharge cell, red, green, and blue phosphor layers 270 that are excited by ultraviolet rays generated from the discharge gas and emit visible light are coated. The red, green, and blue phosphor layers 270 may be applied to any area of the discharge cell. However, the red, green, and blue phosphor layers 270 may be applied to the inside of the partition wall 264 in this embodiment. At this time, the red phosphor layer is made of (Y, Gd) BO ₃ ; Eu ⁺³ , the green phosphor layer is made of Zn ₂ SiO ₄ : Mn ²⁺ , and the blue phosphor layer is BaMgAl ₁₀ O ₁₇ : Eu It is preferable that it ^consists of ²⁺ .

Here, the discharge cells are divided into different sizes, and red, green, and blue phosphor layers having different arrangement structures are coated in adjacent pixels.

In more detail, as shown in FIG.

FIG. 3 illustrates a discharge cell of the plasma display panel of FIG. 2.

Hereinafter, the same reference numerals as in the above-described drawings indicate the same members having the same function.

Referring to the drawings, the partition wall 264 includes a first partition wall 264a and a second partition wall 264b disposed in a direction crossing the first partition wall 264a. The discharge cells partitioned by the combination of the second partition walls 264b form a matrix. In each of the discharge cells, red, green, and blue phosphor layers 270 are coated.

Phosphor layers 270 of different colors are applied in the discharge cells arranged adjacent to the X direction, whereas phosphor layers 270 of the same colors are applied to the discharge cells arranged adjacent to the Y direction. . Alternatively, the phosphor layer 270 may be applied to the contrary.

In this case, the phosphor layer 270 is coated with a different area for each discharge cell. That is, the horizontal and vertical widths W ₃ of the discharge cells coated with the blue phosphor layers 271B and 272B are the horizontal and vertical widths W ₁ of the discharge cells coated with the red phosphor layers 271R and 272R. ) And green phosphor layers 271G and 272G are larger than the horizontal and vertical widths W ₂ of the applied discharge cells. On the other hand, the horizontal and vertical widths W ₁ of the discharge cells coated with the red phosphor layers 271R and 272R are substantially the same as the horizontal and vertical widths W ₂ of the green phosphor layers 271G and 272G. Same as

Accordingly, the area of the discharge cells coated with the blue phosphor layers 271B and 272B is the area of the discharge cells coated with the red phosphor layers 271R and 272R or the green phosphor layers 271G ( 272G) is relatively larger than the area of the applied discharge cells.

The area of the discharge cells coated with the blue phosphor layers 271B and 272B is larger than the area of the discharge cells coated with the red phosphor layers 271R and 272R or the green phosphor layers 271G and 272G. The relatively large reason is that the luminance of the blue phosphor layers 271B and 272B is low and the color temperature is low, so that the discharge cells are enlarged to compensate for this.

Here, red, green, and blue phosphor layers 271R, 271G and 271B applied to one pixel, and red, green, and blue phosphor layers 272R and 272G applied to another pixel adjacent thereto. 272B has a different arrangement structure from each other.

That is, the phosphor layer 270 applied to the discharge cells disposed adjacent to one direction (X direction) of the substrate may include the first red phosphor layer 271R, the first green phosphor layer 271G, and the first blue phosphor layer 271B. ), The second red phosphor layer 272R, the second blue phosphor layer 272B, and the second green phosphor layer 272G in that order.

In this way, the phosphor layer 270 applied to the discharge cells disposed adjacent to one direction of the substrate is red 271R, green 271G, blue 271G, red 272R, blue 272B, and green 272G. It is formed to reduce the number of repetition of the phosphor layer 270 of different colors to reduce the resonance vibration phenomenon.

The operation of the plasma display panel 200 having the above structure will be described with reference to FIGS. 2 and 3 as follows.

First, when a predetermined pulse voltage is applied between the address electrode 262 and the Y electrode 213 from an external power source, a 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 212 and a voltage higher than this is applied to the Y electrode 213, the wall is caused by the voltage difference applied between the X and Y electrodes 212 and 213. The charge will move.

The movement of the wall charges creates a plasma by colliding with discharge gas atoms in the discharge cell, and the discharge starts from a gap of the X and Y electrodes 212 and 213 in which a relatively strong electric field is formed. To the outside.

In this way, after the discharge is formed, if the voltage difference between the X and Y electrodes 212 and 213 becomes lower than the discharge voltage, the discharge no longer occurs, and the space charge and the wall charge are formed in the discharge cell.

At this time, if the polarities of the voltages applied to the X and Y electrodes 212 and 213 are changed to each other, the discharge is generated again with the help of the wall charge. If the polarities of the X and Y electrodes 212 and 213 are changed immediately, the initial discharge process is repeated. The discharge is stably generated while repeating this process.

At this time, the ultraviolet rays generated by the discharge excite the fluorescent material of the phosphor layer 270 applied to each discharge cell. Through this process, visible light is obtained. The generated visible light is emitted to the discharge cells to implement a still image or a moving picture.

In this case, phosphor layers 270 having different colors are applied to discharge cells disposed adjacent to the X direction of the substrate 261, and the applied phosphor layers 270 are formed of the first red phosphor layer 271R and the first phosphor layer 270. The green phosphor layer 271G, the first blue phosphor layer 271B, the second blue phosphor layer 272B, and the second green phosphor layer 272G are repeated in this order, and the number of times the phosphor layer 270 is repeated is repeated. As it increases, the noise due to repetitive resonance vibrations can be reduced.                     

The noise change due to the arrangement change of the phosphor layer applied in the discharge cell by the applicant's experiment is shown in Table 1.

TABLE 1

Comparative example Example Noise 29 23

Here, the comparative example is a conventional case, in the order of red (R), green (G), blue (B), red (R), green (G), blue (B) in adjacent discharge cells along one direction of the substrate. The phosphor layer is applied, and the embodiment is a case of the present invention, in which red (R), green (G), blue (B), red (R), and blue (B) are discharged in adjacent discharge cells along one direction of the substrate. The phosphor layer is applied in the order of green (G).

Referring to Table 1, the comparative example produced a noise of 29 Hz while driving, while the example had a noise of 23 Hz, which was reduced by 6 Hz. That is, as the number of repeated red, green, and blue phosphor layers applied along the adjacent discharge cells decreases, the noise due to the repeated resonance vibration due to the repeated arrangement of the phosphor layers is reduced.

4 illustrates a discharge cell of the plasma display panel according to the second embodiment of the present invention.

Referring to the drawings, the partition wall 464 includes a first partition wall 464a disposed in the X direction of the substrate and a second partition wall 464b disposed in the Y direction of the substrate. The 464a and 464b are combined with each other to form a matrix. Accordingly, the discharge cells partitioned by the combined first and second partitions 464a and 464b have a square shape.

Phosphor layers 470 of red, green, and blue are applied to the discharge cells. Phosphor layers 470 of different colors are applied to the discharge cells adjacent to the substrate in the X direction, whereas the phosphor layers 470 of different colors are applied to the discharge cells. Phosphor layers 470 of the same color are coated in the discharge cells.

At this time, the horizontal and vertical widths W ₆ of the discharge cells coated with the blue phosphor layers 471B and 472B are the widths of the discharge cells coated with the red phosphor layers 471R and 472R to compensate for the color temperature. (W ₄ ) and the green phosphor layers 471G and 472G are formed wider than the width W ₅ of the discharge cells to which the green phosphor layers 471G and 472G are applied, so that the area of the discharge cells is relatively large.

In addition, in order to reduce noise caused by repetitive resonance vibration by reducing the number of times that the phosphor layers 470 of different colors are repeated in the X direction of the substrate, a third red phosphor layer 471R and a third green phosphor layer are disposed on one pixel. 471G, and the third blue phosphor layer 471B, and the other green pixel is adjacent to the fourth green phosphor layer 472G, the fourth blue phosphor layer 472B, and the fourth red phosphor layer 472R. Apply in order.

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

First, the red, green, and blue phosphor layers applied to one pixel and another adjacent pixel are reversed in order to reduce the number of times the phosphor layer applied in the discharge cell is repeated. Accordingly, during driving, the resonant vibration caused by the phosphor layer applied in the discharge cell is broken, thereby reducing noise.                     

Second, as the area of the discharge cells to which the blue phosphor layer having a relatively low color temperature is applied is formed relatively large, this can be corrected.

Although the present invention has been described with reference to the embodiments shown in the 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. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (6)

Front panel; A rear panel disposed in parallel with the front panel; and A plurality of discharge electrodes disposed on the front or rear panel and to which a predetermined discharge voltage is applied; A partition wall disposed between the front and rear panels to define discharge cells of different sizes; It includes; red, green, blue phosphor layer applied in the asymmetric discharge cell, and Plasma display panel, characterized in that the arrangement order of the phosphor layer applied to one pixel and the other adjacent pixel. The method of claim 1, A plasma display panel, characterized in that the area of the discharge cells to which the blue phosphor layer is applied is relatively larger than the area of the discharge cells to which the red and green phosphor layers are applied. The method of claim 2, Plasma display, characterized in that the first red, first green, the first blue phosphor layer is applied to one pixel, and the second red, second blue, second green phosphor layer is applied to another pixel adjacent thereto. panel. The method of claim 3, wherein The phosphor layer is repeatedly applied in the order of the first red, the first green, the first blue, the second red, the second blue, and the second green in the discharge cells disposed adjacent to one direction of the panel. Plasma display panel. The method of claim 2, Plasma display, characterized in that the first red, first green, the first blue phosphor layer is applied to one pixel, and the second green, second blue, second red phosphor layer is applied to another pixel adjacent thereto. panel. The method of claim 5, wherein The phosphor layer is repeatedly applied in the order of the first red, the first green, the first blue, the second green, the second blue, and the second red in discharge cells disposed adjacent to one direction of the panel. Plasma display panel.

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