KR20070101534A - Plasma display panel having - Google Patents

Abstract

A plasma display panel is provided to maintain the discharge dielectric by forming a discharge electrode to have the same width from a display zone to a non-display zone. A panel includes a display zone for displaying an image through discharge induced by pairs of sustain discharge electrodes and address electrodes(212), and a non-display zone, in which the sustain discharge electrodes and the address electrodes are electrically connected to a terminal of a signal transmitting part. The address electrode has a discharge portion(212a) located in the display zone, a terminal(212b) located in the non-display zone, and a connecting portion(212c) electrically connecting the discharge portion with the terminal.

Description

Plasma Display Panel

1 is an enlarged plan view showing a state where a conventional discharge electrode is disposed;

2 is an exploded perspective view of a plasma display panel partially cut out according to an embodiment of the present invention;

3 is a plan view illustrating a state in which the discharge electrode of FIG. 2 is disposed;

4 is an enlarged perspective view of a part of the address electrode of FIG. 2;

<Description of Symbols for Major Parts of Drawings>

200 ... plasma display panel 201 ... first substrate

202 ... Second substrate 203 ... Holding discharge electrode pair

204 ... X electrode 205 ... Y electrode

212 ... address electrode 212a ... discharge

212b ... terminal 212c ... connection

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 in which heat generation is reduced by improving a structure of a discharge electrode.

Typically, a plasma display panel injects and discharges a discharge gas into an enclosed space between opposed substrates on which a plurality of discharge electrodes are disposed, and excites the phosphor layer by ultraviolet rays generated therefrom. A flat display device that implements numbers, letters, or graphics.

The plasma display panel may be classified into a direct current type and an alternating current type according to a type of driving voltage applied to a discharge cell, for example, a discharge type, and may be classified into a counter discharge type and a surface discharge type according to the configuration of the electrodes.

In the case of the three-electrode surface discharge plasma display panel, the first substrate, the second substrate, the X electrode disposed on the inner surface of the first substrate, the sustain discharge electrode pair including the Y electrode, and the sustain discharge electrode are embedded. A first dielectric layer, a protective film layer formed on the surface of the first dielectric layer, an address electrode disposed on an inner surface of the second substrate and intersecting the sustain discharge electrode pair, a second dielectric layer filling the address electrode; And a partition wall disposed between the first substrate and the second substrate to define a discharge space, and a red, green, and blue phosphor layer applied in the partition wall. At this time, the sustain discharge electrode pairs and the address electrodes are grouped in plural numbers so that the sustain discharge electrode pairs and the address electrodes can be connected to terminals of the signal transmission unit such as a flexible printed cable.

In the plasma display panel having the above structure, when an electrical signal is applied to the address electrode and the Y electrode, a discharge cell for emitting light is selected, and when an electrical signal is alternately applied to the X electrode and the Y electrode, the plasma display panel is applied in the selected discharge cell. Visible light is emitted from the phosphor of the phosphor layer so that a still image or a moving image can be realized.

As shown in FIG. 1, the conventional address electrode 100 has a width W ₁ of a discharge part 110 disposed in a display area that implements an image on a substrate, and a width of the terminal part 120 disposed in a non-display area. (W ₂ ) is designed differently. In addition, the connection part 130 connecting the discharge part 110 and the terminal part 120 to each other also has a different width.

That is, the width W ₁ of the discharge unit 110 maintains 90 to 120 micrometers, and the width W ₂ of the terminal unit 120 maintains narrower 70 to 120 micrometers.

However, since the width of the discharge unit 110 has a great effect on the heat generation, it is required to reduce the size for high resolution. In addition, the width of the terminal portion 120 needs to be widened in order to prevent shorting of the electrode as the gap is narrow when intervening impurities due to temperature or humidity.

When the line width of the discharge unit 110 is reduced in this way, the discharge stability becomes poor, and when the interval of the terminal unit 120 increases, causing an increase in the manufacturing cost by causing an increase in the width of the signal transfer unit when the number of channels of the signal transfer unit increases. do.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a plasma display panel capable of reducing heat generation by adjusting the width of the discharge electrode over the entire area of the substrate.

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

A plurality of substrates partitioned between a display area representing an image by discharge and a non-display area electrically connected to an external terminal at an edge of the display area; And

And a discharge electrode disposed to extend from the display area to the non-display area, the discharge electrode having the same width from the display area to the non-display area.

In addition, the width of the discharge electrode is characterized by satisfying the following equation (1).

<Equation 1>

40 <width (W) of discharge electrode <90

Here, the unit of the width of the discharge electrode is micrometers.

In addition, the discharge electrode includes a discharge part disposed in the display area, a terminal part disposed in the non-display area, and a connection part integrally connecting the discharge part and the terminal part.

In addition, the discharge electrode is grouped into a plurality of groups along one direction of the substrate, one group of the grouped discharge electrode is characterized in that the pitch between the discharge portion is disposed wider than the pitch between the terminal portion.

Further, the discharge portion corresponding to the discharge cell of the display area for generating the discharge is further characterized in that the discharge enlarged portion integrally protruded therefrom.

Plasma display panel according to another aspect of the present invention,

A substrate having a first substrate and a second substrate coupled to the first substrate;

A sustain discharge electrode pair disposed in the substrate and to which a sustain discharge voltage is applied; and

An address electrode disposed in the substrate in a direction crossing the sustain discharge electrode pair and to which an address voltage is applied;

A partition wall disposed between the first substrate and the second substrate to partition a discharge cell together with the first substrate;

And a phosphor layer coated in the discharge cell to generate visible light by discharge.

The substrate is divided into a display area for implementing an image by discharge of the discharge electrodes and a non-display area formed at an edge of the display area, wherein the discharge electrodes are electrically connected to an external terminal,

The address electrode may be arranged to maintain the same width from the display area to the non-display area.

In addition, the address electrode is grouped into a plurality of groups, one group of addressed electrode group is characterized in that the pitch between the discharge portion is disposed wider than the pitch between the terminal portion.

Further, the connection portion is characterized in that the inclination angle is formed larger toward the edge from the center of one address electrode group.

Hereinafter, a plasma display panel according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 illustrates a partial cutting of the plasma display panel 200 according to an exemplary embodiment of the present invention.

Referring to the drawings, the plasma display panel 200 includes a first substrate 201 and a second substrate 202 disposed in parallel with the first substrate 201. The first substrate 201 and the second substrate 202 are coated with frit glass along edges of opposed inner surfaces to form a closed discharge space.

The first substrate 201 may be a transparent substrate such as soda lime glass, a semi-transmissive substrate, a reflective substrate, a colored substrate, or the like.

The sustain discharge electrode pair 203 is disposed on the inner surface of the first substrate 201. The sustain discharge electrode pair 203 includes an X electrode 204 and a Y electrode 205, and the X electrode 204 and the Y electrode 205 are arranged in pairs for each discharge cell.

The X electrode 204 electrically connects the first transparent electrode 206 disposed for each discharge cell of the panel 100 and the first transparent electrode 206 disposed along the X direction of the panel 100. The first bus electrode line 207 is included. The Y electrode 205 electrically connects the second transparent electrode 208 disposed for each discharge cell of the panel 100 and the second transparent electrode 208 disposed along the X direction of the panel 100. The second bus electrode line 208 is included.

The first transparent electrode 206 and the second transparent electrode 208 are disposed independently of each discharge cell, have a quadrangular cross section, and the first bus electrode line 207 and the second bus electrode. Line 208 is strip-like extending across adjacently formed discharge cells along the X direction of panel 100 along both edges of opposite sides of the discharge cells.

In this case, the first transparent electrode 206 and the second transparent electrode 208 are made of a transparent conductive film such as an ITO film, and the first bus electrode line 207 and the second bus electrode line 209. It consists of a silver paste excellent in silver conductivity, or metal materials, such as chromium-copper-chromium.

The sustain discharge electrode pair 203 is buried by the first dielectric layer 210 and is coated using a transparent dielectric material, for example, a highly dielectric material such as PbO-B ₂ O ₃ -SiO ₂ .

A protective layer 211 made of magnesium oxide (MgO) is formed on the surface of the first dielectric layer 210 to increase secondary electron emission. The passivation layer 211 is deposited on the surface of the first dielectric layer 210.

The second substrate 202 may be a transparent substrate, a semi-transmissive substrate, a reflective substrate, a colored substrate, or the like. The address electrode 212 is disposed on the inner surface of the second substrate 202 in a direction crossing the Y electrode 205.

The address electrode 212 extends across the discharge cells disposed adjacent to each other along the Y direction of the panel 200, and has a strip shape. The address electrode 212 is made of a metal material having excellent conductivity, for example, silver paste. The address electrode 212 is buried by the second dielectric layer 213. The second dielectric layer 213 is made of a highly dielectric material such as the first dielectric layer 210.

A partition wall 214 is disposed between the first substrate 201 and the second substrate 202. The partition wall 214 is formed to define a discharge cell and to prevent cross-talk between adjacent discharge cells.

The partition wall 214 includes a first partition wall 215 disposed in the X direction of the panel 200, and a second partition wall 216 disposed in the Y direction of the panel 200. The partition wall 215 integrally extends in the opposite direction from the inner side of the second partition wall 216 disposed adjacent to each other, thereby partitioning a matrix discharge space.

The partition wall 215 is not limited to the above-described embodiment and is not limited to any structure as long as it can define a discharge cell. Accordingly, the cross-sectional view of the discharge cell is not only rectangular but also polygonal or circular in shape. Various embodiments are possible, such as elliptical.

In the discharge space partitioned by the first substrate 201, the second substrate 202, and the partition wall 214, neon (Ne) -xenon (Xe), helium (He) -xenon (Xe), and the like. The same discharge gas is injected.

In the discharge cell, there is formed a phosphor layer 217 of a plurality of colors for colorization which is excited by ultraviolet rays generated from the discharge gas and emits visible light. The phosphor layer 217 may be coated on any region of the discharge cell. In the present embodiment, the phosphor layer 217 is formed on the upper portion of the second dielectric layer 213 and on the inner surface of the partition wall 214.

In this case, the phosphor layer 217 is composed of red, green, and blue type super-layers, but is not necessarily limited thereto. In the present embodiment, the red phosphor layer is made of (Y, Gd) BO ₃ ; Eu ⁺³ , the green phosphor layer is made of Zn ₂ SiO ₄ : Mn ²⁺ , and the blue phosphor layer is BaMgAl ₁₀ O ₁₇ : It consists of Eu ²⁺ .

FIG. 2 illustrates a state in which the discharge electrodes of FIG. 1 are disposed.

Referring to the drawings, the X electrode 204 is disposed across the substrate 201 and 202 along the X direction of the panel 200. The Y electrode 205 is also disposed across the substrates 201 and 202 along the X direction of the panel 200 and alternately positioned with the X electrode 204. The address electrode 212 is disposed across the substrates 201 and 202 along the Y direction of the panel 200, and is positioned in a direction crossing the X electrode 204 and the Y electrode 205. have.

At this time, the X electrode 204 is integrally connected by a short bar 204a in one region of the panel 100 by applying the same discharge voltage to each discharge electrode line during the sustain discharge period. The address electrodes 212, which are the Y electrodes 205, are separated from each other in order to apply different discharge voltages to respective discharge electrode lines.

To this end, the X electrode 204 is electrically connected to the X driver 310 in order to process the X driving control signal and apply a common voltage. The Y electrode 205 is electrically connected to the Y driver 320 in order to process the Y drive control signal and apply a scan voltage.

The address electrode 212 is electrically connected to the address driver 330 to process an address drive control signal to generate a display data signal having an address voltage.

Here, the address electrode 212 maintains the same width within a specific numerical range over the entire area of the substrate 202.

In more detail with reference to Figure 4 as follows.

In this case, the panel 200 is divided into a sustain discharge electrode pair 203, a display zone for realizing an image by discharge of the address electrode 212, and an edge of the display area, and the sustain discharge. The electrode pair 203 and the address electrode 212 include a non-display zone that is electrically connected to a terminal of a signal transmission unit such as a flexible printed cable.

Referring to the drawings, the address electrode 212 electrically connects the discharge part 212a disposed in the display area, the terminal part 212b disposed in the non-display area, and the discharge part 212a and the terminal part 212b. It includes a connecting portion 212c for connecting.

The discharge unit 212a is disposed in a region corresponding to each discharge cell. In the present embodiment, as shown in FIG. 2, the discharge unit 212a extends across the center of adjacent discharge cells in the Y direction of the panel 200. The discharge part 212a maintains a strip shape. A plurality of terminal parts 212b are disposed at one edge of the second substrate 202 at predetermined intervals.

Here, the address electrode 212 is grouped into a plurality of groups on the second substrate 202, and the grouped first, second, ..., n-1, nth groups The terminal portion 212b of the group of address electrodes 212 has a length to which the terminals of the signal transfer portion can be electrically connected.

At this time, in one grouped group of address electrodes 212, the pitch P ₁ between the discharge parts 212a is relatively wider than the pitch P ₂ between the terminal parts 212b. The pitch P ₂ between the terminal portions 212b is narrower in order to facilitate electrical connection with the flexible printed cable.

In order to connect the discharge part 212a and the terminal part 212b integrally, the connection part 212c is interposed therebetween. One end of the connection part 212c is connected to the discharge part 212a, and the other end is connected to the terminal part 212b. The discharge part 212a and the terminal part 212b maintain different pitches, and the connection part 212c maintains an oblique line so that the angle of inclination increases from the center of the group toward the edge.

In this case, the width W ₁ of the discharge part 212a, the width W ₂ of the terminal part 212b, and the width W ₃ of the connection part 212c are arranged the same. For example, each of the widths W _{1 to} W ₃ of the discharge part 212a, the terminal part 212b, and the connection part 212c may reduce heat generation by reducing the width while maintaining discharge safety. Are satisfied.

<Equation 1>

40 <width (W) of address electrode <90

Here, the unit of the width of the address electrode is micrometers.

On the other hand, although not shown, the address electrode 212 may further be formed with a discharge enlargement portion that enlarges the area at the portion where the discharge portion 212a intersects the Y electrode 205. The discharge expanding portion may be integrally formed from the sidewall of the discharge portion 212a, which may induce a more stable address discharge.

Hereinafter, Table 1 shows the heating data according to the width change of the address electrode according to the applicant's experiment.

<Table 1>

Comparative example Example Width of Address Electrode (μm) 90 80 Temperature (℃) 53.7 50.3

 Referring to Table 1, in the case of the comparative example, the width of the address electrode is 90 micrometers, and thus the exothermic temperature is measured at 53.7 degrees, whereas in the present embodiment, the width of the address electrode is 80 micrometers, and thus the exothermic temperature Was measured at 50.3 degrees. That is, when the width of the address electrode is limited to a numerical value within a specific range of the present invention, it can be seen that the exothermic temperature is reduced by 3.4 degrees, which means that more stable address discharge can be applied.

 The operation of the plasma display panel 200 having the address electrode 212 having the above structure will be described below.

First, when a predetermined pulse voltage is applied between the address electrode 212 and the Y electrode 205 from an external power source, the discharge cell to emit light is selected. Wall charges are accumulated on the inner surface of the selected discharge cell.

Subsequently, if a voltage of “+” is applied to the X electrode 204 and a voltage higher than this is applied to the Y electrode 205, the wall is caused by the voltage difference applied between the X and Y electrodes 204 and 205. The charge will move.

The movement of the wall charges creates a plasma by colliding with the discharge gas atoms in the discharge cell, and the discharge starts from the discharge gap between the X and Y electrodes 204 and 205 where a relatively strong electric field is formed, It extends outward of the X and Y electrodes 204 and 205.

In this way, after the discharge is formed, if the voltage difference between the X and Y electrodes 204 and 205 becomes lower than the discharge voltage, the discharge no longer occurs, and space charge and wall charge are formed in the discharge cell.

At this time, if the polarities of the voltages applied to the X and Y electrodes 204 and 205 are reversed, the discharge is generated again with the help of wall charges. If the polarities of the X and Y electrodes 204 and 205 are changed immediately, the initial discharge process is repeated. The discharge is stably generated while repeating this process.

At this time, the ultraviolet rays generated by the discharge excite the fluorescent material of the phosphor layer 217 applied to each discharge cell. Through this process, visible light is obtained. The generated visible light is emitted to the discharge cells to implement a still image or a moving picture.

At this time, since the address electrode 212 maintains the same width from the display area of the panel 200 to the non-display area, address discharge stability can be achieved.

As described above, the plasma display panel of the present invention can obtain the following effects.

First, as the widths of the address electrodes are kept the same, the heat dissipation due to the width reduction can be reduced while maintaining the discharge dielectric constant.

Second, by adjusting the interval between the terminal portion according to the width reduction, it is possible to minimize the short due to the inclusion of impurities.

Third, by maintaining the same width, it is easy to manufacture a uniformly shaped electrode, which can bring about an improvement in manufacturing process force.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (11)

A plurality of substrates partitioned between a display area representing an image by discharge and a non-display area electrically connected to an external terminal at an edge of the display area; And And a discharge electrode disposed to extend from the display area to the non-display area and formed to have the same width from the display area to the non-display area. The method of claim 1, The width of the discharge electrode satisfies the following equation (1). <Equation 1> 40 <width (W) of discharge electrode <90 Here, the unit of the width of the discharge electrode is micrometers. The method of claim 1, The discharge electrode includes a discharge part disposed in the display area, a terminal part disposed in the non-display area, and a connection part integrally connecting the discharge part and the terminal part. The method of claim 3, wherein And wherein the discharge electrodes are grouped into a plurality of groups along one direction of the substrate, and in one group of grouped discharge electrodes, a pitch between the discharge portions is wider than a pitch between the terminal portions. The method of claim 3, wherein And a discharge enlarged portion protruding integrally therefrom in a discharge portion corresponding to the discharge cell in the display area for generating the discharge. A substrate having a first substrate and a second substrate coupled to the first substrate; A sustain discharge electrode pair disposed in the substrate and to which a sustain discharge voltage is applied; and An address electrode disposed in the substrate in a direction crossing the sustain discharge electrode pair and to which an address voltage is applied; A partition wall disposed between the first substrate and the second substrate to partition a discharge cell together with the first substrate; And a phosphor layer coated in the discharge cell to generate visible light by discharge. The substrate is divided into a display area that implements an image by discharge of the discharge electrodes, a non-display area that is formed at an edge of the display area, and the discharge electrodes are electrically connected to an external terminal, And the address electrode is disposed to maintain the same width from the display area to the non-display area. The method of claim 6, The width of the address electrode satisfies the following equation (2). <Equation 2> 40 <width (W) of address electrode <90 Here, the unit of the width of the address electrode is micrometers. The method of claim 6, And the address electrode includes a discharge part disposed in the display area, a terminal part disposed in the non-display area, and a connection part electrically connecting the discharge part and the terminal part. The method of claim 8, And the address electrodes are grouped into a plurality of groups, and one group of addressed electrode groups is arranged such that the pitch between the discharge portions is wider than the pitch between the terminal portions. The method of claim 9, And the connecting portion has a larger inclination angle from the center of the one address electrode group toward the edge. The method of claim 8, And a discharge enlarged portion protruding integrally therein for a stable address discharge in the discharge portion disposed in a position corresponding to the discharge cell.

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