KR100603317B1 - Plasma display panel - Google Patents

Abstract

According to the present invention, a plasma display panel is disclosed. The plasma display panel is disposed to face the first panel and the first panel including a plurality of pairs of metal electrodes to form an image display surface, and includes a plurality of address electrodes formed on partition walls and partition walls that partition a plurality of discharge cells. It has a second panel comprising a. According to the disclosed plasma display panel, the brightness and light efficiency of the panel can be improved and the address voltage can be lowered.

Description

Plasma Display Panel {Plasma display panel}

1 is an exploded perspective view illustrating a conventional plasma display panel;

2 is a diagram illustrating a driving signal applied to electrodes of a plasma display panel;

3 is a cross-sectional view taken along the line A-A of FIG.

4 is an exploded perspective view illustrating a plasma display panel according to an exemplary embodiment of the present invention;

FIG. 5 is a view illustrating the plasma display panel of FIG. 4, and taken along line B-B of FIG. 4.

6 is a cross-sectional view illustrating a plasma display panel according to another exemplary embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10 ... first panel 11 ... first substrate

12 metal electrode 14 first dielectric layer

15 ... protective layer 20 ... second panel

21. Second substrate 22. Address electrode

24 ... Bulk 25 ... Fluorescent layer

30.Plasma Display Panel

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 in which brightness and light efficiency are improved and address voltage is lowered.

The plasma display panel is a flat panel display panel which displays an image by using gas discharge phenomenon, and is excellent in various display capabilities such as display capacity, brightness, contrast, afterimage, and viewing angle. In addition, it is being spotlighted as a next-generation flat panel display panel that can replace a CRT because it is thin and can display a large screen.

1 illustrates a form of a conventional plasma display panel. Referring to the drawing, the plasma display panel 130 is provided with the first panel 110 and the second panel 120 bonded to each other.

The first panel 110 includes a first substrate 111, a plurality of pairs of discharge sustaining electrodes 112 formed of a pair of X electrodes 112X and Y electrodes 112Y formed on the first substrate 111, and The first dielectric layer 114 is formed on the first substrate 111 so that the bus electrode 113 in contact with the discharge sustaining electrode 112 and the discharge sustaining electrode 112 and the bus electrode 113 are embedded. Equipped. A protective layer 115 is provided on the first dielectric layer 114.

The second panel 120 includes a second substrate 121, a plurality of address electrodes 122 formed on the second substrate 121, a second dielectric layer 123 covering the address electrode 122, A barrier rib 124 is formed on the second dielectric layer 123 to define a discharge space, and a fluorescent layer 125 is formed on the side surface of the barrier rib 124 in the second dielectric layer 123.

The plasma display panel 130 is provided by bonding and encapsulating the first panel 110 and the second panel 120 configured as described above. In this case, an exhaust process for discharging the impurity gas in the panel 130 and An encapsulation process is performed to fill the discharge gas. Here, the exhausting process is a process of sucking the internal gas from the vent provided on the rear side while the plasma display panel 130 is heated by using a vacuum pump.

2 illustrates driving signals applied to electrodes of the plasma display panel. In FIG. 2, reference numeral SA denotes a drive signal applied to the address electrode 122 of FIG. 1, SX denotes a drive signal applied to the X electrode 112C of FIG. 1, and SY denotes a Y electrode (112Y of FIG. 1). Indicates a drive signal applied to.

In the driving method basically applied to the plasma display panel 130, the steps of resetting, addressing, and display-sustain are sequentially performed. In the resetting step, the charge states of all the discharge cells become uniform.

In the addressing step A, a predetermined wall voltage is generated in the discharge cell. Referring to FIG. 2, the scan pulse of the ground voltage VG is applied to the Y electrode 112Y biased with V SCAN while the positive address voltage VA is applied to the address electrode 122. Is approved. As a result, address discharge is performed between the address electrode 122 and the Y electrode 112Y, whereby wall charges are formed.

In the discharge sustain step S, a predetermined AC voltage VS is applied to the X and Y electrodes 112X and 112Y, so that the discharge cells in which the wall voltage is formed in the addressing step cause sustain discharge. Plasma is generated through the sustain discharge, and the vacuum ultraviolet rays emitted therefrom excite the fluorescent layer 125 to generate visible light.

3 is a cross-sectional view taken along the line A-A of FIG. In the conventional plasma display panel, the first panel 110 becomes an image display surface on which an image is implemented. Therefore, in order for visible light emitted from the phosphor 125 to be emitted to the outside, as shown in FIG. 3, the protective layer 115, the first dielectric layer 114, the discharge sustaining electrode 112, and the first substrate 111 are disposed. In order to transmit sequentially, a considerable amount of visible light is absorbed or blocked by the structures formed in the first panel 110, thereby degrading luminance and light efficiency. In order to improve the brightness, the discharge voltage applied to the discharge sustaining electrode 112 may be increased. In this case, the driving efficiency is lowered.

In addition, according to the conventional plasma display panel 130, as a result of relatively spaced apart from the address electrode 122 and the Y electrode 112Y to perform the address discharge, the address voltage applied to the address electrode 122 is increased. And the problem that the driving efficiency is lowered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and other problems, and an object thereof is to provide a plasma display panel having an improved structure with improved light efficiency and brightness.

Another object of the present invention is to provide an improved plasma display panel in which the address voltage is lowered.

In order to achieve the above object and other objects, the plasma display panel of the present invention,

A first panel including a plurality of pairs of metal electrodes; And

And a second panel disposed to face the first panel to be a display surface of an image, the second panel including a partition wall defining a plurality of discharge cells and a plurality of address electrodes formed on the partition wall.

Here, the metal electrode may be provided with one metal selected from a group of metals consisting of Al, Cu, Cr, and Ag.

The barrier rib may include a top surface facing the first panel and a bottom surface fixed to the second panel, and the address electrode may be formed on a side surface connecting the top surface and the bottom surface of the barrier rib.

 In addition, an upper surface of at least a portion of the barrier rib may be spaced apart from the first panel by a predetermined interval, and the barrier rib on which the address electrode is formed and the barrier rib on which the address electrode is not formed are alternately disposed, and the address electrode is not formed. An upper surface of the barrier rib may be spaced apart from the first panel by a predetermined distance.

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

4 is an exploded perspective view of a plasma display panel according to an exemplary embodiment of the present invention, and FIG. 5 is a diagram illustrating the plasma display panel of FIG. 4, and is a cross-sectional view taken along B-B of FIG. 4.

4 and 5, the plasma display panel 30 in which an image is implemented is provided with the first panel 10 and the second panel 20 bonded to each other.

The first panel 10 includes a first substrate 11, a metal electrode 12, a first dielectric layer 14, and a protective layer 15.

A plurality of pairs of metal electrodes 12 formed of the X electrodes 12X and the Y electrodes 12Y are formed on the first substrate 11, for example, may be provided in a stripe pattern.

In the plasma display panel 30 of the present invention, as shown in FIG. 5, since the second panel 20 serves as an image display surface, the metal electrode 12 provided in the first panel 10 is a transparent electrode. It does not need to be provided as, and therefore, may be provided with a metal material having excellent electrical conductivity, for example, Al, Cu, Cr, Ag and the like.

The first dielectric layer 14 is formed on the first substrate 11 to cover the metal electrode 12, and the protective layer 15 is formed on the first dielectric layer 14. The first dielectric layer 14 is protected from ions and electrons, and also serves as a cathode during discharge.

On the other hand, the second panel 20 includes a second substrate 21, a partition wall 24, an address electrode 22, and a fluorescent layer 25.

The second substrate 21 may be made of a glass soda glass substrate for transmitting visible light.

A partition wall 24 is formed on the second substrate 21 to partition a plurality of discharge cells. As shown in FIG. 4, the partition wall 24 may be provided in a stripe pattern orthogonal to the metal electrode 12.

The address electrode 22, which causes the address discharge together with the metal electrode 12, is formed along the side surface of the partition wall 24, as shown in FIG. 4, and is striped to be substantially orthogonal to the metal electrode 12. It may be provided in a pattern. As shown in FIG. 5, since the second panel 20 becomes an image display surface, the address electrode 22 is formed on the side surface of the partition wall 24 for light transmission of visible light.

In addition, since the address electrode 22 is provided on the side surface of the partition wall 24, the distance from the metal electrode 12 can be reduced, as shown in FIG. 5. Therefore, the address voltage applied to the address electrode 22 can be lowered by the electric field strengthening, so that the driving efficiency can be improved.

As described above, in the plasma display panel 30 of the present invention, the second panel 20 serves as a display surface of an image. Therefore, if visible light emitted from the fluorescent layer 25 is transmitted through only the second substrate 21, it can be recognized from the outside, thereby minimizing the absorption and blocking of visible light, thereby improving brightness and light efficiency of the panel 30. Can be. To this end, the address electrode 22 is formed on the partition wall 24. In this case, the distance between the address electrode 22 and the discharge sustaining electrode 12 is reduced, thereby lowering the address voltage.

On the other hand, as shown in Figure 5, the address electrode 22 is formed in a predetermined pattern, the partition 24 having the address electrode 22 and the partition 24 without the address electrode 22 alternately alternately Can be deployed.

As shown in FIG. 5, the fluorescent layer 25 is formed on the side surface of the barrier rib 24. In this case, the address electrode 22 is formed on the side surface of the barrier rib 24 on which the address electrode 22 is formed. The fluorescent layer 25 is formed to cover. The fluorescent layer 25 is composed of a red fluorescent layer, a green fluorescent layer and a blue fluorescent layer.

The first panel 10 and the second panel 20 may be bonded and encapsulated using, for example, frit glass, and are filled with an exhaust process for discharging impurity gas in the panel 30 and a filling gas with discharge gas. The process takes place. Here, an inert gas such as He, Ne, Xe, Ar, Kr may be used as the discharge gas. In particular, in consideration of the driving voltage and the electrode life, a binary or ternary mixed gas in which a small amount of other inert gas is added to the Xe gas may be used.

6 illustrates another embodiment of the present invention. Referring to the drawings, the plasma display panel 30 includes a first panel 10 and a second panel 20 bonded to each other. The metal panel 12 is formed on the first panel 10. In the second panel 20, an address electrode 22 causing an address discharge is formed together with the metal electrode 12.

Here, the address electrode 22 is formed on the side surface of the partition wall 24. The address electrode 22 is formed in a predetermined pattern to form the partition wall 24 on which the address electrode 22 is formed and the partition wall 24 on which the address electrode 22 is not formed. This can be arranged alternately.

Referring to FIG. 6, the upper surface of the partition wall 24 on which the address electrode 22 is not formed and the first panel 10 are spaced apart by a predetermined distance d. As such, by forming the gap d, the exhaust conductance can be improved, and thus, the process of evacuating the impure gas and the process of encapsulating the discharge gas that proceeds later can be performed smoothly.

When the gap d is narrowly formed, the exhaust gas cannot be smoothly exhausted through such a narrow space, and therefore, the image quality is degraded due to the composition change of the discharge gas.

On the other hand, if the gap d is excessively formed, the charged particles may move to the adjacent discharge cells through this space, which may cause crosstalk.

According to the plasma display panel of the present invention, the following effects can be achieved.

First, the light transmittance of visible light emitted from the fluorescent layer is improved, thereby improving brightness and light efficiency. In the plasma display panel of the present invention, the second panel becomes an image display surface. Therefore, the blocking and absorption of visible light emitted from the fluorescent layer can be minimized, so that the brightness and light efficiency of the panel can be improved. In particular, according to the present invention, since the address electrode provided in the second panel is formed on the partition wall, when visible light only transmits through the glass substrate, it can be recognized from the outside. Compared to the method, the brightness and light efficiency are greatly improved.

Second, the address voltage is lowered, and the driving efficiency of the panel is improved. According to the present invention, an address electrode is formed on the partition wall so that the address electrode and the discharge sustaining electrode can be arranged in close proximity, and therefore, the address voltage can be lowered by the electric field strengthening.

Although the present invention has been described with reference to the embodiments illustrated in the accompanying drawings, it is merely exemplary, and various modifications and equivalent other embodiments are possible from those skilled in the art to which the present invention pertains. You will understand the point. Therefore, the true scope of protection of the present invention should be defined by the appended claims.

Claims (5)

A first panel including a plurality of pairs of metal electrodes; And And a second panel disposed to face the first panel to become an image display surface, the second panel including a partition wall defining a plurality of discharge cells and a plurality of address electrodes formed on the partition wall. The barrier rib includes a top surface facing the first panel and a bottom surface fixed to the second panel, and the address electrode is formed on a side surface connecting the top surface and the bottom surface of the barrier rib, And the barrier rib on which the address electrode is formed and the barrier rib on which the address electrode is not formed are alternately arranged, and an upper surface of the barrier rib on which the address electrode is not formed is spaced apart from the first panel by a predetermined distance. The plasma display panel of claim 1, wherein the metal electrode is made of one metal selected from a group of metals consisting of Al, Cu, Cr, and Ag. delete delete delete

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