KR100670312B1 - Plasma display panel - Google Patents

Abstract

A plasma display panel is disclosed. The present invention provides a display device comprising: a front panel; a rear panel disposed in parallel therewith; a plurality of discharge electrodes disposed on the panel and to which a discharge voltage is applied; and arranged between the panel to define sub-pixels having different sizes. And a red, green, and blue phosphor layer successively formed in the asymmetric subpixel, wherein the red, green, and blue subpixels form one pixel, and the first, second, ..., The red, green, and blue phosphor layers formed in the nth pixel to which a predetermined discharge voltage is finally applied among the n-1th and nth pixels are different from the first, second, ..., n-1th The red, green, and blue phosphor layers formed on the pixels are formed in different order, and finally, the priming particles are supplied from the sub pixels corresponding to the electrode lines to which the discharge voltage is applied. The discharge in the sub-pixels Stabilizes.

Description

Plasma display panel {Plasma display panel}

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

2 is a graph showing a state where an address voltage is applied to a conventional discharge cell;

3 is an exploded perspective view illustrating a partial cutting of the plasma display panel according to the first embodiment of the present invention;

4 is a plan view showing the discharge cell of FIG.

5 is a plan view showing a discharge cell according to a second embodiment of the present invention;

<Description of Symbols for Major Parts of Drawings>

300 ... plasma display panel 310 ... front panel

311 ... Front board 312 ... X electrode

313 ... Y Electrode 314 ... Front Dielectric Layer

315 ... Protective layer 360 ... Back panel

361 ... backplane 362 ... address electrode

363 ... Protective layer 364 ... Bulk

370 phosphor layer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having an improved structure such that discharge within a discharge cell coated with a green phosphor layer is desired.

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

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 the above structure, the electric discharge signal is applied to the Y electrode 104 and the address electrode 107 to select a discharge cell, and then the X and Y electrodes 103 ( By alternately applying an electrical signal to 104, 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. .

2 shows a state in which an address voltage is applied to the discharge cells disclosed in Japanese Patent Laid-Open No. 98-352719.

Referring to the drawings, a discharge electrode line disposed in a discharge cell in which a green phosphor layer is formed has a higher address voltage than a discharge cell in which a blue phosphor layer is formed or a discharge electrode line in a discharge cell in which a red phosphor layer is formed. . Therefore, the discharge in the discharge cell to which the green phosphor layer is applied is delayed. This is because the discharge cells in which the green phosphor layer is formed have a short wall charge accumulation time, and because the green phosphor layer has a negative charge, it is more disadvantageous when addressing than other phosphor layers.

In addition, when the discharge voltage is sequentially applied from the discharge electrode line arranged in the discharge cell arranged on one side of the panel to the discharge electrode line arranged in the discharge cell arranged on the other side, the discharge time of the first discharge electrode line is short, but the last electrode The longer the line, the longer the discharge time. This phenomenon is because the priming particles (priming particles) are not properly supplied, the discharge is not good.

Disclosure of Invention The present invention has been made to solve the above problems, and the discharge in the discharge cell in which the green phosphor layer is formed by changing the arrangement of the discharge cells arranged in the last discharge electrode line of the panel from the arrangement of the discharge cells in other positions. It is an object of the present invention to provide a plasma display panel to make this happen well.

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 and rear panels and to which a predetermined discharge voltage is applied;

A partition wall disposed between the front and rear panels to define sub-pixels having different sizes;

And red, green, and blue phosphor layers continuously formed in the asymmetric sub-pixel.

Red, green, and blue sub-pixels form one pixel, and are applied to the n-th pixel to which a predetermined discharge voltage is finally applied among the first, second, ..., n-1, and nth pixels. The red, green, and blue phosphor layers have a different coating order from the red, green, and blue phosphor layers applied to the other first, second, ..., n-th pixels.

In addition, the first, second, ..., and n-th pixels are repeatedly formed in order of red, green, and blue phosphor layers, and the n-th pixel is formed of green, red, and blue phosphor layers in order. Characterized in that formed.

In addition, the first, second, ..., n-th pixel is formed repeatedly in the order of the red, green, blue phosphor layer, and the n-th pixel in the order of green, blue, red phosphor layer Characterized in that formed.

Further, the green phosphor layer is formed in substantially the same area as the first, second, ..., n-1, n-th pixel.

Further, the green phosphor layer is characterized in that the area formed in the nth pixel is relatively larger than the area formed in the first, second, ..., n-1th pixels.

In addition, the area of the subpixel in which the blue phosphor layer is formed is relatively larger than the area of the subpixel in which the red and green phosphor layers are formed.

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.

3 illustrates a partial cutting of the plasma display panel 300 according to an exemplary embodiment of the present invention.

Referring to the drawings, the plasma display panel 300 includes a front panel 310 and a rear panel 360 disposed to face the front panel 310, and the front and rear panels 310 and 360. ) Is sealed by frit glass applied along the edge of the opposing face.

The front panel 310 is provided with a transparent front substrate 311, for example, soda lime glass. The X electrode and the Y electrode 312 and 313 are disposed on the bottom surface of the front substrate 311 along the X direction of the substrate 311. The X and Y electrodes 312 and 313 are alternately arranged along the Y direction of the substrate 311.

The X electrode 312 is a first bus electrode line electrically connected to a first transparent electrode line 312a formed on an inner surface of the front substrate 311 and along a lower edge of the first transparent electrode line 312a. 312b. On the inner sidewall of the first transparent electrode line 312a, the first discharge part 312c protrudes toward the Y electrode 313 to a predetermined size. The first discharge part 312c is disposed for each discharge cell.

The Y electrode 313 is substantially the same shape as the X electrode 312, and the second transparent electrode line 313a formed on the inner surface of the front substrate 311 and the second transparent electrode line 313a are bottom surfaces thereof. A second bus electrode line 313b is electrically connected along the edge. On the inner sidewall of the second transparent electrode line 313a, a second discharge part 313c protrudes to a predetermined size toward the X electrode 312. The second discharge unit 313c is disposed for each discharge cell in a state in which a discharge gap is formed between the first discharge unit 312c and the discharge unit 313c.

The first and second transparent electrode lines 312a and 313a and the first and second discharge parts 312c and 313c protruding from the first and second transparent electrode lines 312a and 313a may be formed of a transparent conductive film to improve the opening ratio of the front substrate 311. For example, it is made of an ITO film (Indium Tin Oxide Film). The first and second bus electrode lines 312b and 313b may be formed of metal having excellent conductivity to reduce line resistance of the first and second transparent electrode lines 312a and 313a and to improve their electrical conductivity. For example, it consists of a multilayer of silver paste or chromium-copper-chromium alloy.

At this time, the space between the pair of X and Y electrodes 312 and 313 and the pair of X and Y electrodes 312 and 313 adjacent thereto correspond 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 312 and 313 are embedded by the front dielectric layer 314. The front dielectric layer 314 is made of a highly dielectric material such as ZnO—B ₂ O ₃ —Bi ₂ O ₃ . The front dielectric layer 314 may be selectively printed only on a portion where the X and Y electrodes 312 and 313 are formed, or may be front printed on the entire area of the bottom surface of the front substrate 311. A protective layer 315 such as magnesium oxide (MgO) is deposited on the front surface of the front dielectric layer 314 to prevent breakage thereof and to increase secondary electron emission.

A back substrate 361 is provided on the back panel 360, and the back substrate 361 is made of substantially the same material as the front substrate 311. The address electrode 362 is disposed on the back substrate 361. The address electrode 362 is disposed in a direction crossing the X and Y electrodes 312 and 313. The address electrode 362 is embedded by the back dielectric layer 363. The back dielectric layer 363 is made of a highly dielectric material, such as PbO-B ₂ O ₃ -SiO ₂ .

Meanwhile, partition walls 364 are formed between the front and rear panels 310 and 360 to partition the discharge space. The partition 364 includes a first partition 364a disposed in a direction crossing the address electrode 362, and a second partition 364b disposed in a direction parallel to the address electrode 362. The first partition 364a extends from the inner wall to the inner wall of the pair of adjacent second partitions 364b to form a matrix type.

Alternatively, the partition 364 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 polygonal, circular, oval, etc. in addition to the quadrangle.

Meanwhile, discharges such as neon (Ne) -xenon (Xe) or helium (He) -xenon (Xe) are discharged in the discharge cells partitioned by the front and rear panels 310 and 360 and the partition wall 264. Gas is injected.

In the discharge cell, red, green, and blue phosphor layers 370 that are excited by ultraviolet rays generated from the discharge gas and emit visible light are coated. The red, green, and blue phosphor layers 370 may be applied to any region of the discharge cell. However, the red, green, and blue phosphor layers 370 may be applied to the inside of the partition 364. 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, among the first, second, ..., n-1, nth pixels, the red, green, and blue phosphor layers formed on the nth pixel to which a predetermined discharge voltage is finally applied are different from the other first, The order of application is different for the red, green, and blue phosphor layers applied to the second, ..., n-th pixels.

More specifically, as shown in FIG.

FIG. 4 illustrates discharge cells 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 361 includes a first partition 364a disposed in a direction parallel to the X direction of the substrate 361, and a second partition 364b disposed in a direction parallel to the Y direction of the substrate 361. And the first and second partitions 364a and 364b are coupled to each other to define a grid-shaped discharge space.

Phosphor layers 370 of different colors are alternately coated in discharge cells disposed adjacent to each other in the X direction of the substrate 361, and phosphor layers having the same color are disposed in discharge cells disposed adjacent to the Y direction. 370 is applied. Alternatively, the phosphor layer 370 may be applied in the opposite direction.

On the other hand, the substrate 361 includes a display area 361a (display area) for implementing an image due to excitation of the phosphor layer 370 applied to the discharge space partitioned by the partition 361 and the display area 361a. The discharge electrodes 312 (see FIG. 3) 313 and 362 may be formed along edges, and may be divided into non-display areas 361b that are electrically connected to external terminals.

In this case, the partition 361 defines sub pixels of different sizes. That is, if each discharge cell to which red, green, and blue phosphor layers 370 disposed adjacent to each other are applied is called a subpixel, and these three subpixels are defined as one pixel, a blue phosphor layer is formed. The width W ₃ of the subpixels 371B, 372B and 373B is the largest, followed by the width W ₂ of the subpixels 371G, 372G and 373G on which the green phosphor layer is formed, and red. The width W ₁ of the sub-pixels 371R, 372R, and 373R on which the phosphor layers are formed.

Accordingly, the area of the subpixels 371B, 372B, and 373B on which the blue phosphor layer is formed is relatively large, and the subpixels 371G, 372G, 373G on which the green phosphor layer is formed, and the red phosphors. The layered subpixels 371R, 372R and 373R are in order.

The reason why the area of the subpixels 371B, 372B, and 373B on which the blue phosphor layer is formed is relatively large is that the discharge characteristics at the portion where the blue phosphor layer is formed are at the portion where the red and green phosphor layers are formed. This is to compensate for this, because it is relatively deteriorated than the discharge characteristic.

The sub-pixels 371R to 373B on which the red, green, and blue phosphor layers are formed are repeatedly formed in the entire area of the substrate 361, and the first, second, ..., and n-th pixels The red, green and blue phosphor layers formed are different from the red, green and blue phosphor layers formed in the nth pixel.

That is, three subpixels 371R (371G) 371B which constitute the nth-2nd pixel of the display area 361a of the substrate 361 and three subpixels 372R which constitute the n-1th pixel. 372G and 372B are formed with phosphor layers in the order of red (R), green (G), blue (B), red (R), green (G), and blue (B).

In contrast, the three sub-pixels 373G, 373R, and 373B of the display area 361a of the substrate 361 comprise green (G), red (R), and blue (B) in that order. The phosphor layer is formed. The three subpixels 373G, 373R, and 373B constituting the nth pixel are subpixels corresponding to a line to which a voltage is finally applied when a discharge voltage is sequentially applied from one side of the substrate 361.

As described above, when the phosphor layer formed on the pixels disposed adjacent to each other in the one direction (X direction) of the substrate 361 is formed on the first, second, ..., nth-1th pixels, and is formed on the nth pixel. The reason for this difference is that the priming particles are not supplied properly toward the last pixel, and thus the discharge is not good.

In particular, in the sub-pixel 373G in which the green phosphor layer is formed, a discharge delay occurs because the green phosphor layer itself has a negative charge and the wall charge storage time is short. The discharge voltage is preferentially applied to the subpixel 373R having the red phosphor layer or the subpixel 373B having the blue phosphor layer formed on the subpixel 373G having the phosphor layer formed thereon.

The operation of the plasma display panel 300 having the above structure will be described with reference to FIGS. 3 and 4.

First, when a predetermined pulse voltage is applied between the address electrode 362 and the Y electrode 313 from an external power source, the discharge cell to be emitted 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 312 and a voltage higher than this is applied to the Y electrode 313, the wall is caused by the voltage difference applied between the X and Y electrodes 312 and 313. The charge will move.

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 312c of the X and Y electrodes 312 and 313 in which a relatively strong electric field is formed. Starting from the discharge gap between 313c) and expanding outward.

In this way, after the discharge is formed, if the voltage difference between the X and Y electrodes 312 and 313 becomes lower than the discharge voltage, the discharge no longer occurs, and space charge and wall charge are formed in the discharge cell.

At this time, if the polarities of the voltages applied to the X and Y electrodes 312 and 213 are interchanged, the discharge is generated again with the help of the wall charge. If the polarities of the X and Y electrodes 312 and 313 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 370 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, discharge voltages are sequentially applied to the red, green, and blue subpixels disposed adjacent to each other along the X direction of the substrate 361 in the order of first, second, ..., n-1, and nth. Unlike the other first, second, ..., n-th sub-pixels 371R to 372B, the n-th sub-pixel 373G, 373R and 373B to which the discharge voltage is finally applied are Since the wall charge accumulation time is short, the voltage is preferentially applied to the subpixel 373G in which the green phosphor layer having an addressing discharge is formed is disposed so that the discharge occurs well.

5 shows a state where the discharge cells according to the second embodiment of the present invention are arranged.

Referring to the drawings, the partition wall 564 includes a first partition wall 564a disposed in the X direction of the substrate 561 and a second partition wall 564b disposed in the Y direction. 564a and 564b form a matrix.

In addition, the substrate 561 may include a display area 561a for implementing an image due to excitation of the red, green, and blue phosphor layers 570 formed in the discharge cells partitioned by the partition wall 564, and the display area 561a. And a non-display area 561b which is formed at the edge of the and provides an area in which electrical discharge between the discharge electrode and the external terminal is possible.

In this case, the red, green, and blue phosphor layers formed on the first, second, ..., n-1th pixels and the red, green, and blue phosphor layers formed on the nth pixel are different from each other. .

That is, three sub pixels 571R, 571G, and 571B of the display area 561a of the substrate 561 constitute the nth-2nd pixel, and three subpixels of the nth-1th pixel ( The phosphor layer is formed in the order of 572R (572G) 572B in the order of red (R), green (G), blue (B), red (R), green (G), and blue (G).

On the other hand, the three sub-pixels 573G, 573R, and 573B of the display area 561a of the substrate 561 are in the order of green (G), red (R), and blue (B). The phosphor layer is formed. The three subpixels 573G, 573R, and 573B constituting the nth pixel correspond to a line to which the discharge voltage is finally applied when the discharge voltage is sequentially applied to the discharge electrode line from one direction of the substrate 561. Is a subpixel.

On the other hand, the subpixels 571R to 573B having the red, green, and blue phosphor layers are formed on the subpixels having the red, green, and blue phosphor layers forming the first, second, ..., n-th pixels. The area of (571R) 571G, 571B, 572R, 572G, and 572B has an area with the subpixels 573G, 573R, and 573B on which red, green, and blue phosphor layers forming the nth pixel are formed. Asymmetric with each other

That is, among the sub-pixels 571R, 571G, 571B, 572R, 572G, and 572B in which the phosphor layer forming the first, second, ..., n-th pixels is formed, a red phosphor layer is formed. The width W ₁ of the formed subpixels 571R and 572R of the subpixels 573R in which the red phosphor layer is formed among the subpixels 573G and 573R in which the phosphor layer constituting the nth pixel is formed. It is substantially the same as the width W ₈ .

Further, a blue phosphor layer among the subpixels 571R, 571G, 571B, 572R, 572G, and 572B in which the phosphor layer constituting the first, second, ..., n-th pixels is formed. The width W ₃ of the formed subpixels 571B and 572B is also equal to that of the subpixels 573B of the blue phosphor layer among the subpixels 573G and 573R and 573B on which the phosphor layer forming the nth pixel is formed. It is substantially the same as the width W ₉ .

On the other hand, the green phosphor layer among the subpixels 571R, 571G, 571B, 572R, 572G, and 572B in which the phosphor layer constituting the first, second, ..., n-th pixels is formed. The width W ₂ of the formed subpixels 571G and 572G is a subpixel 573G in which a green phosphor layer is formed among the subpixels 573G and 573R and 573B in which the phosphor layer constituting the nth pixel is formed. Is different from the width of W ₇ .

As such, the subpixels 571R in which the phosphor layers forming the nth pixel are formed are arranged in the order of the sublayers 571R in which the phosphor layers forming the first, second, ..., nth pixels are formed. In a different order from the 571G, 571B, 572R, 572G, and 572B, the discharge voltage is first applied to the subpixel 573G on which the green phosphor layer is formed, thereby making it possible to supply the priming particles. .

As described above, the plasma display panel of the present invention has red, green, and blue phosphor layers formed in the first, second, ..., n-1th subpixels among three subpixels arranged in one direction of the substrate. Since the red, green, and blue phosphor layers formed in the nth subpixel are changed in order, the priming particles are supplied from the subpixel corresponding to the electrode line to which the discharge voltage is applied. The discharge in the subpixel in which the phosphor layer of is formed is stabilized.

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 and rear panels and to which a predetermined discharge voltage is applied; A partition wall disposed between the front and rear panels to define sub-pixels having different sizes; And red, green, and blue phosphor layers continuously formed in the asymmetric sub-pixel. The red, green, and blue sub-pixels constitute one pixel, and the n-th pixel to which a predetermined discharge voltage is finally applied among the first, second, ..., n-1, and nth pixels is finally applied. The red, green, and blue phosphor layers formed on the three subpixels are formed on the red, green, and blue phosphor layers formed on the three subpixels forming the first, second, ..., n-1th pixels, respectively. Plasma display panel characterized in that the coating order is formed differently. The method of claim 1, Three subpixels constituting the first, second, ..., n-1th pixels are repeatedly formed in the order of red, green, and blue phosphor layers, and three subpixels constituting the nth pixel are formed. And a green, red and blue phosphor layer in the pixel. delete The method of claim 1, And the green phosphor layer is formed on substantially the same area on each subpixel constituting the first, second, ..., n-1, nth pixels. The method of claim 1, The green phosphor layer has a larger area formed in the subpixels constituting the nth pixel than areas formed in each subpixel constituting the first, second, ..., n-1th pixels. Plasma display panel. The method of claim 1, And the area of the subpixel in which the blue phosphor layer is formed is larger than the area of the subpixel in which the red and green phosphor layers are formed.

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