KR20080006917A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to improve light room contrast by using a complementary color effect between components. A second substrate(20) is positioned apart from a first substrate(10). The second substrate is colored with a first color. A barrier rib(16) is disposed between the first and second substrates in order to define discharge cells. An address electrode(12) is extended in a first direction on the first substrate corresponding to each discharge cell. A display electrode is extended in a second direction crossing the first direction on the second substrate corresponding to each discharge cell. A dielectric layer(14) is formed on the second substrate in order to cover the display electrode. The dielectric layer is colored with a second color as a complementary color. The color element of the second substrate is formed with a blue color element.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

1 is a partially exploded perspective view of a plasma display panel according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

3 is a plan view illustrating a complementary color relationship between a front substrate and a dielectric layer of a plasma display panel according to a first embodiment of the present invention.

4 is a plan view illustrating a complementary color relationship between a front substrate and a dielectric layer of a plasma display panel according to a second exemplary embodiment of the present invention.

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

10; Back substrate 20; Front board

28; Dielectric layer 20c; First color

28c; Second color

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 external light incident on the front surface of the plasma display panel from being reflected to reduce the display ability of an image.

Typically, a plasma display panel is formed of red (R), green (G), and blue (B) generated by exciting a phosphor using vacuum ultraviolet (VUV) emitted from a plasma generated through gas discharge. Implement the image with visible light.

The plasma display panel is classified into a direct current type and an alternating current type according to the applied driving voltage and the structure of the discharge cell. A schematic configuration of an alternating current plasma display panel (hereinafter referred to as a "plasma display panel") will be described. do.

First, address electrodes are formed on a rear substrate, and the address electrodes are covered with a dielectric layer. The partition walls are disposed between the address electrodes on the dielectric layer to form a stripe or matrix shape. The front substrate is spaced apart from the rear substrate so as to face each other, and display electrodes including a pair of sustain electrodes and scan electrodes are formed along a direction crossing the address electrodes. The display electrode is covered with a dielectric layer and a protective film (MgO protective film). A discharge cell is formed at a point where the pair of address electrodes on the rear substrate and the pair of display electrodes on the front substrate cross each other. Phosphor layers of red (R), green (G), and blue (B) are formed inside the discharge cell.

In the above-described plasma display panel, millions of unit discharge cells are arranged in a matrix form, and an image necessary for discharging the selected discharge cells among these discharge cells is displayed.

By the way, when the above-described method is used, while the plasma display panel according to the prior art displays an image on the front surface, external light generated from various light sources is incident on the front surface of the plasma display panel.

In this case, the external light incident on the front surface of the plasma display panel is partially reflected from the front surface of the plasma display panel and mixed with the visible light displayed by the plasma display panel, thereby degrading the display performance of the image actually expressed by the plasma display panel.

In order to solve the above problems, conventionally, a separate black stripe layer is formed on a portion corresponding to the partition wall to reduce reflection of external light due to the front substrate and the dielectric layer.

However, when the black stripe layer is formed separately as in the prior art, there is a problem in that the cost and the process are increased and the production time is increased.

Disclosure of Invention An object of the present invention is to provide a plasma display panel capable of preventing degradation of display performance of a plasma display panel due to reflection of external light by forming a colored layer having a complementary color relationship to elements constituting the plasma display panel without forming a black stripe layer. There is.

In order to achieve the above object, the present invention is disposed between the first substrate and the first substrate, the second substrate to be colored in the first color, the partition wall disposed between the first substrate and the second substrate to partition the discharge cells An address electrode extending in a first direction corresponding to each discharge cell on the first substrate, a display electrode extending in a second direction crossing the first direction on the second substrate, respectively, and corresponding to each discharge cell; The display substrate may be covered on the second substrate, and may include a dielectric layer colored in a second color having a complementary color relationship with the first color.

In the above configuration, the coloring raw material component of the second substrate may include a component selected from the group consisting of manganese (Mn), nickel (Ni), and cobalt (Co).

The colored raw material component of the dielectric layer may be formed of an orange-based colored raw material component and may include a component selected from the group consisting of copper (Cu), antimony (Sb), and chromium (Cr).

In addition, a first substrate, a second substrate spaced apart from the first substrate, the second substrate is colored in a first color, a partition wall disposed between the first substrate and the second substrate to partition the discharge cells, each discharge cell on the first substrate A corresponding address electrode which extends in a first direction and correspondingly extends in a second direction on the second substrate and crosses the first direction and is formed to correspond to each discharge cell, and covers the display electrode on the second substrate. And a dielectric layer colored in a second color having a complementary color relationship with the first color, wherein the colored raw material component of the dielectric layer may be a blue-based colored raw material component.

In the above configuration, the coloring raw material component of the dielectric layer may include a component selected from the group consisting of manganese (Mn), nickel (Ni), and cobalt (Co).

In addition, the color raw material component of the second substrate may be made of an orange-based color raw material component, it may include a component selected from the group consisting of copper (Cu), antimony (Sb), chromium (Cr).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. While many specific details are set forth in order to provide a more general understanding of the invention, such as the following description and the annexed drawings, these specific details are illustrated for the purpose of illustrating the invention and are meant to limit the invention to those details. It is not. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a partially exploded perspective view of a plasma display panel according to a first exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

A configuration of a plasma display panel according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The plasma display panel includes a first substrate 10 (hereinafter, referred to as a "back substrate"), a second substrate 20 (hereinafter, referred to as a "front substrate") and a rear substrate 10 which are disposed to face each other at predetermined intervals. And a partition wall 16 provided between the front substrate 20 and the front substrate 20.

The front substrate 20 is formed by coloring the first color 20c.

The first color 20c colored on the front substrate 20 forms a complementary color relationship with the second color 28c colored on the dielectric layer 28, which will be described later, and prevents the display efficiency of the plasma display panel from being lowered due to external light reflection. Do it.

In the plasma display panel, an address electrode 12 and a display electrode are formed to correspond to each discharge cell 18 between the rear substrate 10 and the front substrate 20 so as to realize an image by gas discharge. 21 and a scanning electrode 22 are provided.

The address electrode 12 extends along the first direction (y-axis direction in the drawing) on the inner surface of the back substrate 10 and continuously corresponds to the discharge cells 18 adjacent in the first direction. . In addition, the plurality of address electrodes 12 are arranged side by side to correspond to adjacent discharge cells 18 in a second direction (the x-axis direction of the drawing) that crosses the first direction. Since the address electrode 12 is disposed on the rear substrate 10 and does not prevent the visible light from being irradiated forward, the address electrode 12 may be formed of an opaque electrode (that is, a metal electrode having excellent conductivity). The address electrode 12 is disposed on the inner surface of the back substrate 10 and covered with the dielectric layer 14. The dielectric layer 14 prevents cations or electrons from directly colliding with the address electrode 12 during discharge, thereby preventing damage to the address electrode 12 and forming and accumulating wall charges.

In this embodiment, the partition wall 16 is formed on the dielectric layer 14 at a predetermined height between the rear substrate 10 and the front substrate 20 to partition the plurality of discharge cells 18. The discharge cell 18 is filled with a discharge gas (eg, a mixed gas including neon (Ne), xenon (Xe), etc.) to generate vacuum ultraviolet rays by gas discharge, and emits visible light by absorbing the vacuum ultraviolet rays. The phosphor layer 19 is provided. As shown in FIG. 1, the partition wall 16 includes a first partition member 16a formed in a first direction and a second partition member 16b formed in a second direction perpendicular to the first partition member 16a. ), The discharge cells 18 are formed in a matrix structure. In addition, the partition walls may be formed to extend in the first direction, and the plurality of partition walls may be arranged side by side along the second direction to form discharge cells in a stripe structure (not shown).

The phosphor layer 19 formed in each of the discharge cells 18 is formed by applying a phosphor paste on the side surface of the partition wall 16 and the surface of the dielectric layer 14 and firing it. The phosphor layer 19 is formed of phosphors of the same color in the discharge cells 18 formed along the first direction. In addition, the phosphor layer 19 is repeatedly formed by the phosphors of red (R), green (G), and blue (B) in the discharge cells 18 repeatedly arranged along the second direction.

On the other hand, the sustain electrode 21 and the scan electrode 22 are provided on the inner surface of the front substrate 20, so that the surface discharge structure corresponding to each discharge cell 18 so as to cause gas discharge in the discharge cell 18 Form. The sustain electrode 21 and the scan electrode 22 extend in a second direction crossing the address electrode 12.

Each of the sustain electrodes 21 and the scan electrodes 22 includes transparent electrodes 21a and 22a for generating a discharge and bus electrodes 21b and 22b for applying a voltage signal to the transparent electrodes 21a and 22a, respectively. do. Each of the transparent electrodes 21a and 22a is a part which causes surface discharge in the discharge cell 18, and is a transparent material (eg, indium tin oxide, ITO) to secure the aperture ratio of the discharge cell 18. Is formed. The bus electrodes 21b and 22b are formed of a metal material having excellent conductivity to compensate for the high electrical resistance of the transparent electrodes 21a and 22a.

Meanwhile, referring to FIGS. 1 and 2, the sustain electrode 21 and the scan electrode 22 cross the address electrodes 12 and are covered with the dielectric layer 28 facing each other corresponding to the discharge cells 18. .

As described above, the dielectric layer 28 is colored with the second color 28c having a complementary color relationship with the first color 20c colored on the front substrate 20. In this case, the front substrate 20 and the dielectric layer 28 are colored to have sufficient transmittance enough to implement an image by transmitting visible light generated inside the plasma display panel when colored in each color including a coloring raw material component. It is preferable.

In the first embodiment of the present invention, the first color 20c colored on the front substrate 20 is used as a blue series, and the second color 28c colored on the dielectric layer 28 has a complementary color relationship with the blue series. Can be used as orange series.

That is, the colored raw material component of the front substrate 20 is composed of a blue-based colored raw material component, and includes a component selected from the group consisting of manganese (Mn), nickel (Ni), and cobalt (Co).

In addition, the colored raw material component of the dielectric layer 28 is composed of an orange-based colored raw material component and includes a component selected from the group consisting of copper (Cu), antimony (Sb), and chromium (Cr).

However, the present invention is not limited thereto, and the first color 20c colored on the front substrate 20 and the second color 28c colored on the dielectric layer 28 may be formed in a color series forming a complementary color relationship with each other. have.

The dielectric layer 28 forms and accumulates wall charges during discharge while protecting the sustain electrode 21 and the scan electrode 22 from gas discharge. The dielectric layer 28 is covered with the protective film 29. The passivation layer 29 is formed of magnesium oxide (MgO) that protects the dielectric layer 28 to increase the secondary electron emission coefficient upon discharge.

In the driving of the plasma display panel having the above-described configuration, in the reset period, reset discharge is caused by a reset pulse applied to the scan electrode 22. In the addressing period following the reset period, address discharge is caused by a scan pulse applied to the scan electrode 22 and an address pulse applied to the address electrode 12. Thereafter, in the sustain period, sustain discharge is caused by a sustain pulse applied to the sustain electrode 21 and the scan electrode 22.

The sustain electrodes 21 and the scan electrodes 22 serve as electrodes for applying sustain pulses required for sustain discharge, and the scan electrodes 22 serve as electrodes for applying reset pulses and scan pulses. The address electrode 12 serves as an electrode for applying an address pulse. The sustain electrode 21, the scan electrode 22, and the address electrode 12 may have different roles depending on voltage waveforms applied to the sustain electrode 21, the scan electrode 22, and the address electrode 12, respectively.

The plasma display panel selects a discharge cell 18 to be turned on by the address discharge due to the interaction between the address electrode 12 and the scan electrode 22, and the interaction between the sustain electrode 21 and the scan electrode 22. An image is realized by driving the selected discharge cells 18 by the sustain discharge.

3 is a plan view illustrating a complementary color relationship between a front substrate and a dielectric layer of a plasma display panel according to a first embodiment of the present invention.

Referring to FIG. 3, the first blue color 20c colored on the front substrate 20 and the second orange color 28c colored on the dielectric layer 28 are complementary to each other. The portion of the substrate 20 and the dielectric layer 28 overlapped with black color 24c.

Therefore, the front substrate 20 and the dielectric layer 28 form a separate black stripe layer by forming a black 24c external light reflection prevention layer on the partition 16 and the discharge cells 18 as shown in FIG. There is no need to form.

As described above, the first color 20c of the blue color colored on the front substrate 20 and the second color 28c of the orange color colored on the dielectric layer 28 overlap with each other to black 24c. As it is displayed, external light incident through the front substrate 20 of the plasma display panel is absorbed in the process of passing through the colored front substrate 20 and the dielectric layer 28 to prevent degradation of display performance due to reflection of external light. do.

Referring to Table 1, it can be seen that bright contrast is greatly increased by the complementary color effect of the front substrate colored with the first color 20c and the dielectric layer colored with the second color 28c.

division Prior art The present invention Real room contrast 70: 1 92: 1

Referring to Table 2, it can be seen that the external light reflection luminance due to external light reflection is reduced. When the external light reflectance is reduced, the user's emotional image quality is greatly improved.

division Prior art The present invention External light reflectance (cd / m2) 15.2 10.5

On the other hand, the complementary color configuration of the front substrate and the dielectric layer of the plasma display panel according to the first embodiment of the present invention also affects the technique of coloring the partition wall 16. That is, as the colored front substrate 20 and the dielectric layer 28 form a black external light reflection prevention layer on the partition 16 and the discharge cells 18, the partition 16 may be formed of an uncolored dielectric material. Because it can. When the partition wall 16 is not colored, the phosphor layer 19 may be formed of a phosphor material including a white powder having a high reflectance.

Therefore, even if the transmittance of visible light excited in the discharge cell 18 decreases as the front substrate 20 and the dielectric layer 28 are colored, the luminance of the visible light emitted by the partition wall 16 decreases to compensate for the luminance. In addition, as the phosphor layer 19 having a high reflectance is formed in the discharge cell 18, the luminance can be further improved.

On the other hand, the detailed description of the present invention has been described with reference to specific embodiments, of course, various modifications are possible without departing from the scope of the invention.

Although the first embodiment described above has described the front substrate colored with the first color 20c and the dielectric layer colored with the first color 20c and the second color 28c having a complementary color relationship, the general knowledge of the art If you have one, you can improve the complementary color relationship between the front substrate and the dielectric layer.

4 is a plan view illustrating a complementary color relationship between a front substrate and a dielectric layer of a plasma display panel according to a second exemplary embodiment of the present invention.

Referring to FIG. 4, the first color 30c colored on the front substrate 30 is used as an orange series, and the second color 38c colored on the dielectric layer 38 is complemented with an orange series. Can be used as

In this case, the colored raw material component of the front substrate 30 may be composed of an orange-based colored raw material component, and may include a component selected from the group consisting of copper (Cu), antimony (Sb), and chromium (Cr).

In addition, the colored raw material component of the dielectric layer 38 may be formed of a blue-based colored raw material component, and may include a component selected from the group consisting of manganese (Mn), nickel (Ni), and cobalt (Co).

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below but also by the equivalents of the claims.

As described above, the plasma display panel according to the present invention can prevent the display efficiency due to reflection of external light by improving contrast due to the complementary color effect between the elements constituting the plasma display panel without forming a separate black stripe layer. It can be effective.

In addition, it is not necessary to form a black stripe layer separately, it is possible to reduce the cost according to the formation of the black stripe layer, there is an effect that the process is reduced to reduce the production time.

Claims (8)

A first substrate; A second substrate spaced apart from the first substrate and colored in a first color; Barrier ribs disposed between the first substrate and the second substrate to partition discharge cells; An address electrode formed on the first substrate and extending in a first direction corresponding to each of the discharge cells; Display electrodes formed on the second substrate to extend in a second direction crossing the first direction and respectively correspond to the discharge cells; And A dielectric layer covering the display electrode on the second substrate and colored in a second color having a complementary color relationship with the first color; The colored raw material component of the said 2nd board | substrate consists of a blue-based colored raw material component. The method of claim 1, The colored raw material component of the second substrate is a plasma display panel comprising a component selected from the group consisting of manganese (Mn), nickel (Ni), cobalt (Co). The method of claim 1, The colored raw material component of the dielectric layer is a plasma display panel consisting of a colored raw material component of the orange series. The method of claim 3, The colored raw material component of the dielectric layer is a plasma display panel including a component selected from the group consisting of copper (Cu), antimony (Sb), chromium (Cr). A first substrate; A second substrate spaced apart from the first substrate and colored in a first color; Barrier ribs disposed between the first substrate and the second substrate to partition discharge cells; An address electrode formed on the first substrate and extending in a first direction corresponding to each of the discharge cells; Display electrodes formed on the second substrate to extend in a second direction crossing the first direction and respectively correspond to the discharge cells; And A dielectric layer covering the display electrode on the second substrate and colored in a second color having a complementary color relationship with the first color; The colored raw material component of the dielectric layer is a plasma display panel comprising a blue-based colored raw material component. The method of claim 5, The colored raw material component of the dielectric layer is a plasma display panel including a component selected from the group consisting of manganese (Mn), nickel (Ni), cobalt (Co). The method of claim 5, The colored raw material component of the second substrate is a plasma display panel comprising an orange-based colored raw material component. The method of claim 7, wherein The colored raw material component of the second substrate is a plasma display panel including a component selected from the group consisting of copper (Cu), antimony (Sb), chromium (Cr).

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