KR100542765B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel that can prevent deformation of the delta-type partition wall.

The plasma display panel according to the present invention includes a delta partition wall having a plurality of first partition walls and a second partition wall intersecting the first partition wall, wherein the delta partition wall is formed at an intersection of the first and second partition walls. It is characterized by having a relatively thick width.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}             

1 is a plan view showing a plasma display panel having a conventional delta partition.

FIG. 2 is a cross-sectional view of the plasma display panel taken along the line " I-I '"

3 is a plan view showing a delta partition wall shown in FIG. 1 before a firing process.

4 is a plan view showing a deformation of the delta-shaped partition wall shown in FIG. 1 after the firing process.

5 is a plan view showing a plasma display panel having a delta partition wall according to the present invention.

FIG. 6 is a plan view illustrating the delta partition wall illustrated in FIG. 5. FIG.

FIG. 7 is a plan view illustrating another form of the delta partition wall illustrated in FIG. 5. FIG.

<Description of Symbols for Main Parts of Drawings>

X: data electrode Y: scan electrode

Z: sustain electrode 10: upper substrate

12Y, 12Z, 42Y, 42Z: transparent electrode 13Y, 13Z, 43Y, 43Z: bus electrode

14,22 dielectric layer 16: protective film

18: lower substrate 20: phosphor

24,54: 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 capable of preventing deformation of a delta type partition wall.

Plasma Display Panels (hereinafter referred to as "PDPs") are characterized by emitting phosphors by 147 nm ultraviolet rays generated during discharge of an inert mixed gas such as He + Xe, Ne + Xe or He + Ne + Xe. An image containing graphics is displayed. Such a PDP is not only thin and easy to enlarge, but also greatly improved in quality due to recent technology development. In particular, the three-electrode AC surface discharge type PDP has advantages of low voltage driving and long life because wall charges are accumulated on the surface during discharge and protect the electrodes from sputtering caused by the discharge.

Recently, a PDP structure having a rectangular delta partition wall has been proposed as shown in FIGS. 1 and 2 to increase the coating area of the phosphor to improve the brightness of the PDP.

The PDP having the rectangular delta partition 24 has a delta structure in which discharge cells positioned adjacent to each other up and down form one pixel. In other words, the PDP has one pixel including an R subpixel and a B subpixel facing each other with the second partition wall 24b interposed therebetween, and a G subpixel facing the R and B subpixel with the first partition wall 24a interposed therebetween. To form.

A discharge cell of a PDP having a rectangular delta partition wall has a pair of sustain electrodes formed on the upper substrate 10, that is, a scan electrode Y and a sustain electrode Z, and an address electrode X formed on the lower substrate 18. ).

Each of the scan electrode Y and the sustain electrode Z of the sustain electrode pair has a line width smaller than the line widths of the transparent electrodes 12Y and 12Z and the transparent electrodes 12Y and 12Z and is formed at one edge of the transparent electrode. (13Y, 13Z). The transparent electrodes 12Y and 12Y are usually formed on the upper substrate 10 by indium tin oxide (ITO). The bus electrodes 13Y and 13Z are usually made of metal such as chromium (Cr) and formed on the transparent electrodes 12Y and 12Z to overlap the rectangular delta partition 24 so that the voltages of the transparent electrodes 12Y and 12Z are high. It serves to reduce the descent.

The upper dielectric layer 14 and the passivation layer 16 are formed on the upper substrate 10 on which the sustain electrode pairs Y and Z are formed. The upper dielectric layer 14 accumulates wall charges generated during plasma discharge. The passivation layer 16 prevents damage to the upper dielectric layer 14 due to sputtering generated during plasma discharge and increases emission efficiency of secondary electrons. As the protective film 16, magnesium oxide (MgO) is usually used.

The data electrode X is formed in the direction crossing the scan electrode Y and the sustain electrode Z. FIG. The lower dielectric layer 22 for wall charge accumulation is formed on the lower substrate 18 on which the data electrode X is formed. A rectangular delta partition 24 is formed on the lower dielectric layer 22, and a phosphor 26 is coated on the surfaces of the lower dielectric layer 22 and the partition 24. The rectangular delta partition wall 24 prevents the ultraviolet and visible light generated by the discharge from leaking into the adjacent discharge cells. The rectangular delta partition wall 24 is formed of a plurality of first partition walls 24a formed to overlap the bus electrodes 13Y and 13Z, and crosses the first partition walls 24a and parallel to the data electrodes X. It consists of two partitions 24b. The phosphor 20 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue. Inert gas for gas discharge is injected into the discharge space provided between the upper and lower substrates 10 and 18 and the partition wall 24.

The discharge cell of this structure is selected by the counter discharge between the data electrode X and the sustain electrode Y, and then sustains the discharge by the surface discharge between the pair of sustain electrodes Y and Z. In such a discharge cell, the fluorescent material 26 emits light by ultraviolet rays generated during sustain discharge, so that visible light is emitted to the outside of the cell. As a result, the discharge cells adjust the period during which the discharge is maintained to implement gray scale, and the PDP in which the discharge cells are arranged in a matrix form displays an image.

Conventional square delta partition 24 is formed in a rectangular shape as shown in Figure 3 before firing. However, when the firing process is performed at 550 to 600 ° C., the shrinking direction of the thermal stress of the first and second partitions 24a and 24b at the intersection between the first and second partitions 24a and 24b (arrow in FIG. 3). Unlike this, as shown in FIG. 4, the rectangular delta partition 24 is deformed into a hexagonal shape. Accordingly, since the bus electrodes 13Y and 13Z overlapping the conventional first partition wall 24a block the visible light emission area by the deformation of the rectangular delta partition wall 24, the luminous efficiency is lowered. To solve this problem, when the bus electrodes 13Y and 13Z are formed in an uneven shape to correspond to the deformed shape of the rectangular delta partition 24, the bus electrodes 13Y and 13Z and the lower substrate 18 of the upper substrate 10 are formed. There is a problem that it is difficult to align the square delta bulkhead 24 of. That is, there is a problem that it is difficult to accurately align the uneven portions of the bus electrodes 13Y and 13Z and the uneven portions of the rectangular delta partition wall 24.

Accordingly, an object of the present invention is to provide a plasma display panel capable of preventing deformation of the delta-type partition wall.

In order to achieve the above object, the plasma display panel according to the present invention includes a delta-type partition wall having a plurality of first partition walls and a second partition wall intersecting the first partition wall, wherein the delta-type partition walls include the first and second partition walls. It is characterized by having a relatively thick width in the intersection area of the second partition wall.

The width at the intersection of the first and second partitions is thicker than the width of the central portion of the second partition.

The second partition wall has a relatively thick width in a region corresponding to the first partition wall.

The second partition wall is characterized in that the width of the center portion is smaller than the width of the upper / lower portion overlapping the first partition wall.

The second partition wall is gradually narrower in width from the upper portion to the central portion, and gradually wider in width from the central portion toward the lower portion.

The discharge space provided by the delta-type partition wall is characterized in that it has a round corner.

The central portion of the second partition wall maintains a constant width, and the upper and lower portions of the second partition wall are inclined to have a predetermined angle with the central portion.

The discharge space provided by the delta partition wall is characterized in that it is formed in an octagonal shape.

The plasma display panel further includes a bus electrode formed in a stripe form overlapping the first partition wall, a transparent electrode formed under the bus electrode, and a data electrode formed in parallel with the second partition wall. It is done.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 5 to 7.

5 is a view showing a plasma display panel according to the present invention.

Referring to FIG. 5, the PDP according to the present invention has a delta structure in which discharge cells positioned adjacent to each other up and down form one pixel. In other words, the PDP according to the present invention has an R subpixel and a B subpixel facing each other with the second partition 54b interposed therebetween, and a G subpixel facing the R and B subpixel with the first partition 54a interposed therebetween. The subpixels form one pixel.

The PDP according to the present invention includes a data electrode X formed in parallel with the second partition 54b, and a pair of sustain electrodes Y and Z intersecting the data electrode X.

Each of the scan electrodes Y and the sustain electrodes Z of the sustain electrode pair has a line width smaller than that of the transparent electrodes 42Y and 42Z and the transparent electrodes 42Y and 42Z, and has one edge of the transparent electrodes 42Y and 42Z. The bus electrodes 43Y and 43Z are formed in a stripe shape. The transparent electrodes 42Y and 42Y are usually formed on the upper substrate 10 by indium tin oxide (ITO). The bus electrodes 43Y and 43Z are usually made of metal such as chromium (Cr) and formed on the transparent electrodes 42Y and 42Z so as to overlap the delta-shaped partition wall 54 so that the voltages of the transparent electrodes 42Y and 42Z are high. It serves to reduce the descent.

Meanwhile, the PDP according to the present invention includes a delta-type partition wall 54 having a plurality of first partition walls 54a and a second partition wall 54b intersecting the first partition walls 54a, as shown in FIG. 6. Equipped. The second partition wall 54b is formed at predetermined intervals in pixel row units.

The width W2 at the intersection of the first and second partitions 54a and 54b is wider than the width W1 of the second partition 54b.

To this end, as shown in FIG. 6, the first partition wall 54a is formed in a stripe shape D with a width greater than or equal to the bus electrodes 43Y and 43Z to cover the stripe-shaped bus electrodes 43Y and 43Z. In the second partition 54b, the upper and lower portions 60a and 60c are formed in a round shape so that the width of the upper and lower portions 60a and 60c is wider than the width of the central portion 60b. That is, the width of the second partition wall 54b gradually decreases from the upper portion 60a to the central portion 60b, while gradually increasing the width from the central portion 60b toward the lower portion 60c. Accordingly, the corner regions C intersecting the first and second partition walls 54a and 54b are formed in a round shape, and the discharge space P is formed to have round corners.

Alternatively, as illustrated in FIG. 7, the first partition wall 54a is formed in a stripe shape D so as to have a width greater than or equal to the bus electrodes 43Y and 43Z so as to cover the stripe bus electrodes 43Y and 43Z. 54b is formed in the form of a straight line in which the side surfaces of the upper and lower portions 70a and 70c are inclined at a predetermined slope so that the upper and lower portions 70a and 70c are wider than the width of the central portion 70b. Accordingly, the edge region C where the first and second partition walls 54a and 54b intersect is formed in a straight line shape inclined with a predetermined slope with the data electrode X, so that the discharge space P is formed in an octagonal shape. .

As such, the width W2 at the intersection of the first and second barrier ribs 54a and 54b becomes relatively wider, so that the shrinkage force against heat during the firing process of the barrier rib becomes small, thereby preventing deformation of the delta-type barrier rib 54. have. In other words, the delta-type partition wall 54 maintains the same shape as after firing and before firing.

As a result, since the bus electrodes 43Y and 43Z overlap the delta-shaped partition wall 54, the aperture ratio is widened to increase the visible light switching efficiency. In addition, the bus electrodes 43Y and 43Z can be formed in a stripe shape so as to overlap the delta partition 54, so that the upper and lower substrate bonding processes are facilitated. In addition, by forming the corner region where the first and second partitions 54a and 54b intersect in a round shape or in a straight line having a slope, the phosphor coating area is wider than that of the conventional rectangular delta partition wall, thereby increasing the luminous efficiency. In addition, the size of each discharge cell can be made uniform, resulting in uniform discharge characteristics of the PDP.

As described above, the plasma display panel according to the present invention has a relatively wide width of the intersection point of the first and second partitions where deformation occurs due to the difference in contraction force between the first and second partitions. Accordingly, deformation of the first and second partition walls generated during the firing step can be prevented. In addition, by forming the corner region of the delta-shaped partition wall in a round shape or a linear shape inclined at a predetermined angle, the phosphor coating area is widened, and the aperture ratio is improved. In addition, since the bus electrodes are formed in a stripe shape, alignment of the upper substrate on which the bus electrodes are formed and the lower substrate on which the delta-shaped partition walls are formed is facilitated.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (9)

A transparent electrode; A bus electrode formed in a stripe shape on the transparent electrode; A delta-type partition wall including a first partition wall having a wider width than the bus electrode and a second partition wall intersecting the first partition wall at a position overlapping with the bus electrode, And the delta-type partition wall has a relatively thick width at an intersection area of the first and second partition walls. The method of claim 1, And a width at an intersection area of the first and second barrier ribs is thicker than a width of a central portion of the second barrier rib. The method of claim 1, And the second partition wall has a relatively thick width in a region corresponding to the first partition wall. The method of claim 3, wherein And the second partition wall has a smaller central width than an upper / lower width overlapping the first partition wall. The method of claim 4, wherein And the second partition wall gradually decreases in width from the upper portion to the center portion, and gradually widens from the center portion toward the lower portion thereof. The method of claim 5, And a discharge space provided by the delta-type partition wall has rounded corners. The method of claim 4, wherein The central portion of the second partition wall maintains a constant width, and the upper and lower portions of the second partition wall is inclined to have a predetermined angle with the central portion. The method of claim 7, wherein And a discharge space provided by the delta partition wall is formed in an octagonal shape. The method of claim 1, And a data electrode formed to be parallel to the second partition wall.

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