KR100659070B1 - Plasma display panel - Google Patents

Abstract

Plasma display panel according to the present invention comprises a front substrate and a rear substrate disposed to face each other; A front dielectric layer and a back dielectric layer formed on the bottom surface of the front substrate and the top surface of the back substrate, respectively; Address electrodes spaced apart from each other in the rear dielectric layer; A plurality of discharge cells provided between the front substrate and the rear substrate and discharged therein; Phosphor layers disposed in the discharge cells; Bus electrodes arranged in the front dielectric layer in pairs with each of the discharge cells in a direction crossing the address electrodes; Protruding electrodes arranged to extend from the bus electrodes toward the center of each discharge cell; And a conductor layer disposed at each of the protruding electrodes and disposed at end portions of the protruding electrodes facing each other, the size of the disposed region being a conductor layer that varies depending on a position where the protruding electrodes are disposed in the front substrate. It is characterized by including. By such a configuration of the plasma display panel, the uniformity of luminance is improved over the entire surface of the panel.

Description

Plasma Display Panel {Plasma display panel}

1 is an exploded perspective view showing an example of a conventional plasma display panel.

FIG. 2 is a rear view illustrating a state in which bus electrodes and protruding electrodes of the plasma display panel of FIG. 1 are disposed.

3 is a diagram illustrating a luminance distribution of the plasma display panel of FIG. 1.

4 is a rear view showing a state in which the bus electrodes and the protruding electrodes of the plasma display panel according to the present invention are arranged at the edge of the plasma display panel.

5 is a cross-sectional view taken along the line VV of FIG. 4.

6 is a rear view showing a state in which the bus electrodes and the protruding electrodes of the plasma display panel according to the present invention are arranged at the center of the plasma display panel.

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

10 front substrate 11 front dielectric layer

12 ... protective layer 20 ... back board

21.Back dielectric layer 22.Address electrode

30 bulkhead 31 discharge cell

32 phosphor layer 33 non-discharge area

40 ... Discharge sustaining electrode pair 41 ... Bus electrode

42 Protruding electrode 50 Conductor layer

1, 100 ... plasma display panel 301 ... horizontal bulkhead

303 Vertical bulkhead 421

422 Slant extension 423 Parallel extension

424 ...

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 luminance is uniformly maintained throughout its entire surface.

In general, a plasma display panel is a device for realizing a predetermined image by exciting a phosphor with ultraviolet rays generated by gas discharge, and has been spotlighted as a next-generation thin display device because a large screen can be configured with high resolution.

1 and 2, a conventional plasma display panel 1 includes a front substrate 10 and a rear substrate 20, address electrodes 22, discharge cells 31, and phosphor layers 32. ) And a discharge sustaining electrode pair 40.

The front substrate 10 and the rear substrate 20 are disposed to face each other, and the front substrate 10 is formed of a transparent material such as glass through which visible light can be transmitted so that an image is displayed. The front dielectric layer 11 and the back dielectric layer 21 are formed on the bottom surface of the front substrate 10 and the top surface of the back substrate 20, respectively. The front dielectric layer 11 and back dielectric layer 21 are each made of a dielectric such as PbO, B ₂ O ₃ , SiO _2, and the like. The front dielectric layer 11 is covered with a protective layer 12 such as MgO.

The address electrodes 22 are arranged side by side to be spaced apart from each other on the back substrate 20, and have a stripe shape. The address electrodes 22 are covered by the back dielectric layer 21 and embedded therein, and a partition wall 30 is formed between the address electrodes 22 on the top of the back dielectric layer 21. The barrier rib 30 includes a plurality of horizontal barrier ribs 301 arranged to be parallel to the address electrode 22 and a plurality of vertical barrier ribs 302 arranged to be parallel to each other and to cross the barrier ribs 301.

The discharge cells 31 are partitioned by the partition walls 30 and are provided between the front substrate 10 and the rear substrate 20. The discharge is generated inside the discharge cell 31 to implement an image. In the present embodiment, the discharge cells 31 are formed by the horizontal partition wall 301 and the vertical partition wall 302 and have a rectangular parallelepiped shape. As shown in FIGS. 1 and 2, non-discharge regions 33 in which discharge is not generated are arranged around the discharge cells 31 along the direction in which the address electrode 22 is formed. It is provided every time.

The phosphor layer 32 is disposed in each of the discharge cells 31. The phosphor layer 32 is formed by being applied to an inner surface of the partition wall 30 and an upper surface of the back dielectric layer 21 surrounded by the partition wall 30. The color of the phosphor layer 32 is roughly divided into red, green, and blue to realize an image. Each discharge cell 31 is filled with a discharge gas in which neon (Ne), xenon (Xe), and the like are mixed, and the phosphor layer 32 emits visible light by being excited by ultraviolet rays generated during discharge.

The discharge sustaining electrode pairs 40 are disposed on the rear surface of the front substrate 10. The discharge sustaining electrode pair 40 is covered by the front dielectric layer 11 and embedded. The discharge sustaining electrode pair 40 has bus electrodes 41 and protruding electrodes 42.

The bus electrodes 41 are arranged in pairs to each of the discharge cells 31 in a direction crossing the address electrodes 22. Since the bus electrodes 41 apply voltage to each of the protruding electrodes 42, the bus electrodes 41 are formed of a metal having excellent conductivity, such as silver (Ag) or copper (Cu).

The protruding electrodes 42 are disposed to extend from the bus electrodes 41 to the center of each of the discharge cells 31 and are electrically connected to the bus electrodes 41. In the present exemplary embodiment, each of the protruding electrodes 42 has a main body portion 421 having a constant width, and an inclined extension portion formed to have a narrow width from the main body portion 421 toward the bus electrode 41. 422 and a parallel extension portion 423 extending from the inclined extension portion 422 toward the bus electrode 41 and having a width equal to the width of an end portion of the inclined extension portion 422. A recess 424 immersed in the direction of the bus electrode 41 is formed at an end of the main body 421. The protruding electrodes 42 are disposed to face each other in the discharge cells 31. Each protruding electrode 42 is formed of a transparent material such as indium tin oxide (ITO) in order to transmit visible light emitted from the phosphor layer 32.

However, in the case of realizing an image by driving the plasma display panel 1 having the above-described configuration, the luminance is lowered from the edge of the panel 1 toward the center part due to the discharge of the discharge gas, so that the luminance is reduced. There is a problem that uniformity is not guaranteed over the entire surface of the panel 1. As such, the non-uniformity of luminance can be confirmed through the graph shown in FIG. 3.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a plasma display panel having an improved structure such that a conductor layer is disposed on the protruding electrodes so that the luminance is uniformly maintained throughout the entire surface. It is.

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

A front substrate and a rear substrate disposed to face each other;

A front dielectric layer and a back dielectric layer formed on the bottom surface of the front substrate and the top surface of the back substrate, respectively;

Address electrodes spaced apart from each other in the rear dielectric layer;

A plurality of discharge cells provided between the front substrate and the rear substrate and discharged therein;

Phosphor layers disposed in the discharge cells;

Bus electrodes arranged in the front dielectric layer in pairs with each of the discharge cells in a direction crossing the address electrodes;

Protruding electrodes arranged to extend from the bus electrodes toward the center of each discharge cell; And

It is disposed at the ends of the protruding electrodes facing each other and disposed in each discharge cell of the protruding electrodes, the size of the disposed region has a conductor layer that varies depending on the position in which the protruding electrodes are disposed in the front substrate Characterized in that.

According to the present invention, it is preferable that the area where the conductor layer is arranged on the protruding electrodes is larger when the protruding electrodes are arranged on the center portion of the front substrate than when the protruding electrodes are disposed on the edge side of the front substrate. .

In addition, according to the present invention, each of the conductor layers preferably has a predetermined width.

In addition, according to the present invention, the conductor layer is preferably formed of the same material as the bus electrode.

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

4 is a rear view illustrating a state in which the bus electrodes and the protruding electrodes of the plasma display panel are arranged at the edge of the plasma display panel, FIG. 5 is a cross-sectional view taken along line V-V of FIG. 4, and FIG. The bus electrodes and the protruding electrodes of the plasma display panel according to the present invention are rear views showing the state in which they are disposed in the center of the plasma display panel.

4 to 6, the plasma display panel 100 of the present embodiment is the front substrate 10 and the back substrate 20, similar to the conventional plasma display panel 1 described with reference to FIGS. 1 and 2. And the address electrodes 22, the discharge cells 31, the phosphor layer 32, and the discharge sustaining electrode pair 40.

In the present embodiment, the front substrate 10 and the rear substrate 20, the address electrodes 22, the discharge cells 31, the phosphor layer 32, and the discharge sustain electrode pair 40 are shown in FIG. 1 and 2 have the same configuration and function as those in the conventional plasma display panel 1 described above, and thus, detailed descriptions thereof will be omitted.

In addition, the same reference numerals are given to the same members or portions shown in FIGS. 1 and 2 among the members or portions shown in FIGS. 4 to 6, and detailed descriptions thereof will be omitted.

On the other hand, the plasma display panel 100 of the present embodiment has a conductor layer 50 unlike the conventional plasma display panel 1.

The conductor layer 50 is disposed at each of the discharge cells of the protruding electrodes 42 and disposed at ends of the protruding electrodes 42 facing each other. That is, as illustrated in FIGS. 4 and 6, the conductor layer 50 is disposed at an end portion of the protruding electrode positioned at the center of each discharge cell 31. The size of the region where the conductor layer 50 is disposed depends on the position where the protruding electrodes 42 are disposed in the front substrate 20. That is, as shown in FIG. 4, when the protruding electrode 42 is disposed at the edge of the front substrate 20, an area of the conductor layer 50 disposed on the protruding electrode 42 is shown in FIG. 6. As shown, when the protruding electrode 42 is disposed at the center of the front substrate 20, the protruding electrode 42 is smaller than the area of the conductor layer 50 disposed on the protruding electrode 42. In this manner, the conductor layer 50 may be appropriately disposed on the protruding electrodes 42 in order to improve the luminance uniformity of the plasma display panel 100. The conductor layer 50 is formed of a metal having excellent conductivity, such as silver (Ag), copper (Cu), or the like, and is formed of the same material as the bus electrode 41 in the present embodiment, so that the protruding electrode 42 is formed. It is applied to the field. Each conductor layer 50 has a predetermined width and is disposed on a rear surface of the protruding electrode 42 facing the rear substrate 20.

As shown in FIGS. 4 and 6, the conductor layer 50 is coated in different sizes according to the positions of the protruding electrodes disposed on the panel 100, thereby driving the plasma display panel 100 to implement an image. As a result, the uniformity of the luminance over the entire surface of the panel 100 is improved in the conventional plasma display panel 1 shown in FIGS. 1 and 2 to obtain a high quality image.

As mentioned above, the present invention has been described in detail with reference to preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications may be made by those skilled in the art within the technical idea of the present invention. It is obvious.

 By using the plasma display panel according to the present invention having the above-described configuration, it is possible to improve the uniformity of luminance over the entire surface of the panel.

Claims (4)

A front substrate and a rear substrate disposed to face each other; A front dielectric layer and a back dielectric layer formed on the bottom surface of the front substrate and the top surface of the back substrate, respectively; Address electrodes spaced apart from each other in the rear dielectric layer; A plurality of discharge cells provided between the front substrate and the rear substrate and discharged therein; Phosphor layers disposed in the discharge cells; Bus electrodes arranged in the front dielectric layer in pairs with each of the discharge cells in a direction crossing the address electrodes; Protruding electrodes arranged to extend from the bus electrodes toward the center of each discharge cell; And It is disposed at the ends of the protruding electrodes facing each other and disposed in each discharge cell of the protruding electrodes, the size of the disposed region has a conductor layer that varies depending on the position in which the protruding electrodes are disposed in the front substrate Plasma display panel characterized in that. The method of claim 1, And a region in which the conductor layer is disposed on the protruding electrodes is larger when the protruding electrodes are disposed at the center portion of the front substrate than when the protruding electrodes are disposed at the edge of the front substrate. The method of claim 1, And wherein each of the conductor layers has a predetermined width. The method of claim 1, And the conductor layer is formed of the same material as the bus electrode.

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