KR100325454B1 - Plasma Display Panel - Google Patents

Abstract

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel capable of high luminance and low voltage driving. Plasma display panel of the present invention, the back substrate and the front substrate; Address electrodes formed on the rear substrate and formed so that at least two or more are disposed in one discharge cell; A first dielectric layer coated on the rear substrate at a predetermined thickness along a surface thereof and surfaces of address electrodes; Barrier ribs formed on the first dielectric layer to define a unit discharge cell; A phosphor coated on a side of the barrier rib and a portion of the first dielectric layer between the barrier ribs; A dummy electrode formed on a phosphor portion above the address electrode; A discharge sustain electrode formed on the front substrate, the discharge sustain electrode comprising a transparent electrode and a bus electrode; A second dielectric layer coated on the front substrate so as to cover a discharge sustain electrode; And a protective layer applied on the second dielectric layer, wherein the back substrate and the front substrate are bonded to each other such that the address electrode and the discharge sustain electrode are vertically crossed at the same time as the electrode arrangement surfaces thereof face each other, and the discharge defined by the partition wall. The space is characterized in that the discharge gas is sealed.

Description

Plasma display panel

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel capable of high luminance and low voltage driving.

Plasma Display Panel (PDP), which is one of the flat panel display devices, is composed of an array of discharge cells capable of independently discharging, and discharges each discharge cell independently according to an electrical signal applied from the outside. To reproduce the image.

Since the overall thickness of the PDP can be less than 1 cm, the thickness and weight of the PDP can be remarkably reduced compared to the CRT display device using an electron gun. In addition, the PDP can secure a wide viewing angle compared to the LCD. .

In addition, the PDP has a structure in which a pair of glass substrates are bonded to each other through a barrier rib defining a discharge cell. The PDP has a wider space between the barrier ribs, thereby making it easier to manufacture a large display device. It also has advantages.

FIG. 1 is a cross-sectional view illustrating a unit discharge cell of a conventional AC PDP. As illustrated, the AC PDP may include a rear substrate 10 having an address electrode 2 and a front surface having a discharge sustaining electrode 14. The substrates 20 are bonded to face each other, and a discharge gas 30 such as argon (Ar), neon (Ne), or xenon (Xe) is sealed in the discharge space between the substrates 10 and 20. .

Here, the address electrode 2 and the first dielectric layer 4 covering the address electrode 2 are formed on the rear substrate 10, and the independent discharge spaces are defined on the first dielectric layer 4 and between the adjacent discharge spaces. Partition walls 6 are formed to prevent crosstalk of the phosphors, and phosphors 8 are coated between the partition walls 6.

Discharge holding electrodes 14 including transparent electrodes 11 and bus electrodes 12 are formed on the front substrate 20, and the discharge holding electrodes 14 are covered on the front substrate 20 to cover the discharge substrates 14. The second dielectric layer 16 is coated on its entire surface, and a protective layer 18 made of MgO having a high secondary electron emission coefficient is applied thereon.

At this time, although not shown, the discharge sustaining electrodes are formed in one discharge space, that is, one pair of discharge cells.

On the other hand, when the back substrate 10 and the front substrate 20 are bonded together, the address electrode 2 and the discharge sustaining electrode 14 are bonded to each other vertically and cross each other.

However, in the conventional PDP as described above, since the phosphor is coated on the planarized first dielectric layer, high luminance cannot be obtained due to the small coating area of the phosphor, and the discharge start voltage is very high.

Accordingly, an object of the present invention is to provide a PDP capable of high voltage and low voltage driving as well as to solve the above problems.

1 is a cross-sectional view showing a conventional AC plasma display panel.

2 is a cross-sectional view illustrating a rear substrate of a plasma display panel according to an exemplary embodiment of the present invention.

3 is a cross-sectional view illustrating a front substrate of a plasma display panel according to an embodiment of the present invention.

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

(Explanation of symbols for the main parts of the drawing)

22: address electrode 22a: first address electrode

22b: second address electrode 24: first dielectric layer

26: partition 28: phosphor

29 dummy electrode 30 back substrate

31: bus electrode 32: transparent electrode

32a: first bus electrode 32b: second bus electrode

34a: X electrode 34b: Y electrode

34: discharge sustain electrode 36: second dielectric layer

38: protective layer 40: front substrate

PDP of the present invention for achieving the above object, the back substrate and the front substrate; Address electrodes formed on the rear substrate and formed so that at least two or more are disposed in one discharge cell; A first dielectric layer coated on the rear substrate at a predetermined thickness along a surface thereof and surfaces of address electrodes; Barrier ribs formed on the first dielectric layer to define a unit discharge cell; A phosphor coated on a side of the barrier rib and a portion of the first dielectric layer between the barrier ribs; A dummy electrode formed on a phosphor portion above the address electrode; A discharge sustain electrode formed on the front substrate, the discharge sustain electrode comprising a transparent electrode and a bus electrode; A second dielectric layer coated on the front substrate so as to cover a discharge sustain electrode; And a protective layer applied on the second dielectric layer, wherein the rear substrate and the front substrate are bonded so that the address electrodes and the discharge sustain electrodes are vertically crossed at the same time as the electrode arrangement surfaces thereof face each other, and the discharge is limited by the partition wall. The space is characterized in that the discharge gas is sealed.

According to the present invention, since the coating area of the phosphor is increased, the luminance can be improved, and since the distance between the address electrode and the discharge sustaining electrode is reduced, low voltage driving is possible.

(Example)

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

Figure 2 is a cross-sectional view showing a lower substrate of the PDP according to an embodiment of the present invention, the manufacturing method will be described with reference to this.

First, the silver (Ag) paste is printed on the back substrate 30 about two to three times to form the address electrode 22, and the first dielectric layer on the back substrate 30 using the glass paste so as to cover them. 24) Apply all over. Then, barrier ribs 26 are formed in the upper portion of the first dielectric layer 24 to define a unit discharge cell. Then, the first dielectric layer between the sidewalls of the barrier ribs 26 and the barrier ribs 26 is formed. The phosphor 28 is applied on the portion.

Here, the address electrodes 22 are formed so that at least two, preferably two, are arranged in one discharge cell, the shape of which is about 50 to 60 µm in the lower width, about 20 to 30 µm in the upper width, The height is formed to have a thickness of about 30 to 40 μm, which is about twice that of the conventional art.

Accordingly, as shown in the drawing, the first dielectric layer 24 which is entirely coated with a predetermined thickness along the surfaces of the back substrate 30 and the first and second address electrodes 22a and 22b is different from the surface step. In addition, since the phosphor 28 applied on the first dielectric layer 24 is also applied along the surface of the first dielectric layer 24, the phosphor 28 has a surface step.

Therefore, since the luminance of the PDP is influenced by the coating amount of the phosphor, the PDP of the present invention can obtain a high luminance at the time of its driving due to an increase in the coating area of the phosphor than in the prior art.

Meanwhile, although not shown, the first and second address electrodes 22a and 22b disposed in one discharge cell are connected to each other at a terminal part, although not shown.

Subsequently, any one of the first and second address electrodes 22a and 22b disposed in one discharge cell, for example, the secondary electron emission coefficient on the phosphor part on the first address electrode 22a A dummy electrode 29 made of a high MgO metal film is formed.

3 is a cross-sectional view showing a front substrate according to an embodiment of the present invention, the manufacturing method with reference to this as follows.

First, discharge sustaining electrodes 34 composed of the X electrode 34a and the Y electrode 34b are formed on the front substrate 40 by a known method. Here, the X electrode 34a and the Y electrode 34b are composed of a transparent electrode 31 made of an ITO metal film and bus electrodes 32a and 32b formed by printing a silver paste, in particular, the X electrode. In the case of 34a, the silver paste printing process is performed two to three times so that the thickness of the first bus electrode 32a is thicker than the thickness of the second bus electrode 32b at the Y electrode 34b.

Subsequently, the second dielectric layer 36 is entirely coated on the front substrate 40 on which the discharge sustaining electrode 34 is formed along the surfaces of the front substrate 40 and the discharge sustaining electrodes 34. On this top, a protective layer 38 made of a MgO metal film is formed.

Figure 4 is a cross-sectional view showing a PDP according to the present invention manufactured by bonding the back substrate and the front substrate as described above, as follows.

As shown, the back substrate 30 and the front substrate 40 are bonded to each other so that the address electrode 22 and the discharge sustain electrode 34 formed on one side thereof face each other vertically and cross each other. A discharge gas (not shown) is enclosed in the discharge cell defined by 26.

In the PDP of the present invention having such a structure, since the coating area of the phosphor 28 applied on the back substrate 30 is increased than before, the luminance can be improved.

In addition, since the height of the first address electrode 22a which participates in the discharge start has been increased compared with the prior art, and the height of the first bus electrode 32a of the X electrode 34a has also increased, the electrodes 22a have been increased. , The distance between 34a is reduced by 80 to 85% compared to the prior art, and the dummy electrodes 29 made of a MgO metal film having a large secondary electron emission coefficient are interposed between the electrodes 22a and 34a. From this, the discharge start voltage can be significantly reduced than before.

As described above, the present invention can increase the coating area of the phosphor by disposing at least two or more address electrodes in the unit discharge cell to generate a surface step on the back substrate, thereby increasing the coating area of the phosphor Due to this, a high brightness PDP can be obtained.

In addition, by reducing the gap between the address electrode and the discharge sustaining electrode and further forming a dummy electrode made of a MgO metal film having a high secondary electron emission coefficient on the address electrode, the discharge start voltage can be lowered than before. The power consumption can be reduced due to the implementation of a PDP capable of driving a low voltage.

Meanwhile, although specific embodiments of the present invention have been described and illustrated, modifications and variations can be made by those skilled in the art. Accordingly, the following claims are to be understood as including all modifications and variations as long as they fall within the true spirit and scope of the present invention.

Claims (4)

Back and front substrates; Address electrodes formed on the rear substrate and formed so that at least two or more are disposed in one discharge cell; A first dielectric layer coated on the rear substrate at a predetermined thickness along a surface thereof and surfaces of address electrodes; Barrier ribs formed on the first dielectric layer to define a unit discharge cell; A phosphor coated on a side of the barrier rib and a portion of the first dielectric layer between the barrier ribs; A dummy electrode formed on a phosphor portion above the address electrode; A discharge sustain electrode formed on the front substrate, the discharge sustain electrode comprising a transparent electrode and a bus electrode; A second dielectric layer coated on the front substrate so as to cover a discharge sustain electrode; And A protective layer applied on the second dielectric layer, And the rear substrate and the front substrate are joined so that the electrode arrangement surfaces face each other and the address electrodes and the discharge sustain electrodes are vertically and intersected, and the discharge gas is sealed in the discharge space defined by the partition wall. The method of claim 1, wherein the address electrode A plasma display panel characterized in that the lower width is 50 to 60 mu m, the upper width is 20 to 30 mu m, and the height is 30 to 40 mu m. The plasma display panel of claim 1, wherein the dummy electrode is formed of an MgO metal film. The plasma display panel of claim 1, wherein the bus electrode of the X electrode is formed thicker than the bus electrode of the Y electrode.