KR20070032887A - Plasma Display Panel - Google Patents

Abstract

A plasma display panel is provided to lower a breakdown voltage and reduce power consumption by forming a protective layer having one or more depression parts. A first electrode is formed on a first substrate. A dielectric layer(504) having one or more first depression parts(A) is formed on the first substrate in order to cover the first electrode. A second depression part(B) corresponding to the first depression part is formed at a protective layer in order to cover the dielectric layer. A second substrate is disposed opposite to the first substrate. A second electrode is formed across the first electrode on the second substrate. A barrier rib(512) is formed between the first and second substrates in order to define a plurality of discharge cells. At least one of the discharge cells includes one or more first depression parts and one or more second depression parts.

Description

Plasma Display Panel {Plasma Display Panel}

1 is a cross-sectional view showing the structure of one discharge cell of a conventional plasma display panel.

2 is a conceptual diagram for explaining discharge and wall charge distribution in a conventional plasma display panel.

3 is a cross-sectional view showing the structure of a differential dielectric of a conventional plasma display panel.

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

5 is a cross-sectional view showing one discharge cell in FIG.

6 is a side view of a front panel showing an example in which a plurality of first recesses and second recesses are formed in one discharge cell;

7A and 7B are side views of the front panel for explaining an example in which the first depression includes the second depression.

8A to 8C are side views of a front panel showing an example of the shape of the first recessed portion and the second recessed portion.

9A and 9B are side views of the front panel showing an example having respective protrusions between the first depressions and the second depressions.

10 is a plan view of a front panel showing an example of a position where a first depression is formed;

11 is a conceptual diagram illustrating a discharge and wall charge distribution in a plasma display panel according to an exemplary embodiment of the present invention.

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

500: front substrate 501: front glass

502: scan electrode 503: sustain electrode

a: transparent electrode b: bus electrode

504: dielectric layer 505: protective layer

A: first depression B: second depression

A ': first protrusion B': second protrusion

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel in which a dielectric and a protective layer are differentially formed.

In general, a plasma display panel is a partition wall formed between a front panel and a rear panel to form one unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and The same main discharge gas and an inert gas containing a small amount of xenon (Xe) are filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image.

The structure of one discharge cell of the plasma display panel is shown in FIG. 1.

1 is a cross-sectional view showing the structure of one discharge cell of a conventional plasma display panel.

As shown in FIG. 1, in the conventional plasma display panel, the front panel 100 and the rear panel 110 are disposed in parallel with a predetermined distance.

First, the front panel 100 includes a plurality of sustain electrode pairs formed by pairing the scan electrode 102 and the sustain electrode 103 on the front glass 101, which is a display surface on which an image is displayed, and the sustain electrode pairs. An electrically insulating dielectric layer 104 and a protective layer 105 on which magnesium oxide (MgO) is deposited are formed on the top surface of the dielectric layer 104 to facilitate discharge conditions.

In addition, the rear panel 110 on which the address electrodes 113 are arranged to intersect with the plurality of sustain electrode pairs on the rear glass 111 forming the rear surface is coupled in parallel at a predetermined distance.

Here, a partition wall 112 for partitioning one discharge cell is formed on the rear panel 110, and the phosphor 114 coated on the discharge cell emits light to display an image.

Looking at the distribution of the wall charges generated during the discharge in one discharge cell described above as shown in FIG.

2 is a conceptual diagram illustrating a discharge and wall charge distribution in a conventional plasma display panel.

As shown in FIG. 2, when a predetermined pulse is applied to the scan electrode 102 and the sustain electrode 103 of the conventional plasma display panel, wall charges are accumulated on the protective layer 105. Discharges are caused by wall charges.

However, in the conventional plasma display panel having such a structure, since wall charges are accumulated on the flat protective layer 105, the discharge voltage is relatively high.

In addition, since the respective points on the protective layer 105 in which the negative wall charges and the positive wall charges are mostly accumulated are relatively far apart, there is a problem of further increasing the aforementioned discharge start voltage.

As such, in order to lower a relatively high discharge start voltage, a depression recessed in the direction of the front glass 101 is formed in the upper dielectric layer 104. The structure in which the depression is formed in the upper dielectric layer 104 is called a differential dielectric structure, which will be described in more detail with reference to FIG. 3.

3 is a cross-sectional view illustrating a structure of a differential dielectric of a conventional plasma display panel.

As shown in FIG. 3, in the structure of the differential dielectric of the conventional plasma display panel, a depression A recessed in the direction of the front glass 101 is formed in each upper dielectric layer 104 of the discharge cell. The depression A has a predetermined depth h in the vertical direction and a predetermined width W in the horizontal direction.

However, even when the upper dielectric 104 is differentially formed in this manner, since the protective film 105 is formed flat, the respective points on the protective layer 105 are still far apart, thereby effectively reducing the discharge start voltage. There was a problem that can not be.

Accordingly, an object of the present invention is to provide a plasma display panel in which a dielectric and a protective layer corresponding thereto are formed to have one or more depressions.

In order to achieve the object of the present invention, a plasma display panel includes: a first substrate on which a first electrode is formed; A dielectric layer formed on the first substrate to cover the first electrode and having one or more first depressions formed therein; A protective layer covering the dielectric layer and having a second recessed portion corresponding to the first recessed portion; A second substrate having a second electrode formed to intersect the first electrode and disposed to face the first substrate; A partition wall partitioning the plurality of discharge cells between the second substrate and the first substrate, wherein at least one of the plurality of discharge cells includes at least one first recessed portion and at least one second recessed portion; It is done.

In this case, the first recessed portion and the second recessed portion may be formed between the first electrodes in the discharge cell.

The first depressions and the second depressions are characterized in that they are formed in the same number in each discharge cell.

Here, the longitudinal width of the first recessed portion and the second recessed portion is smaller than or equal to the distance between the first electrodes.

Alternatively, the longitudinal width of the first recessed portion may be greater than the longitudinal width of the second recessed portion.

Here, the cross section of the first recessed portion and the second recessed portion may be any one of a polygonal shape or a curvature shape.

At this time, the first recess is characterized in that it is formed to be connected to the adjacent recess in the horizontal direction.

Here, the plurality of first depressions in the at least one discharge cell of the plurality of discharge cells, characterized in that the protrusion is formed between the plurality of first depressions.

At this time, the height of the protrusion is characterized in that the same or lower than the depth of the depression.

The first recess and the second recess are formed at positions corresponding to the second electrodes.

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.

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

As shown in FIG. 4, the plasma display panel includes a plurality of sustain electrodes formed by pairing a first electrode, for example, a scan electrode 502 and a sustain electrode 503, on a front glass 501, which is a display surface on which an image is displayed. A rear panel in which a plurality of second electrodes, for example, an address electrode 513, is arranged to intersect the first electrodes, which are the plurality of storage electrode pairs described above, on the front panel 500 and the rear glass 511 forming a pair. 510 is coupled in parallel with a certain distance therebetween.

The front panel 500 is made of a scan electrode 502 and a sustain electrode 503, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 502 and the sustain electrode 503 provided as the bus electrode b are included in pairs.

The scan electrode 502 and the sustain electrode 503 are covered by one or more dielectric layers 504 that limit the discharge current and insulate the electrode pairs, and on top of the dielectric layer 504 to facilitate discharge conditions. A protective layer 505 on which magnesium oxide (MgO) is deposited is formed.

In this case, the dielectric layer 504 is formed with at least one first depression A recessed in the direction of the front glass 501, and the protective layer 505 has a second recessed to correspond to the depression of the dielectric layer 504. A depression B is formed.

The rear panel 510 is arranged on the rear glass 511 such that a plurality of discharge spaces, that is, barrier ribs 512 of a stripe type (or well type) for forming the discharge cells are arranged in parallel. In addition, a plurality of address electrodes 513, which perform address discharge to generate vacuum ultraviolet rays, are disposed in parallel with the partition wall 512.

On the upper side of the rear panel 510, R, G, and B phosphors 514 which emit visible light for displaying an image during address discharge are coated. A dielectric layer 515 is formed between the address electrode 513 and the phosphor 514 to protect the address electrode 513.

In the plasma display panel having such a structure, the shapes of the first recessed portion A and the second recessed portion B formed in the dielectric layer 504 and the protective layer 505 in one discharge cell will be described with reference to FIG. 5. Same as

5 is a cross-sectional view illustrating one discharge cell in FIG. 4.

As shown in FIG. 5, in one discharge cell partitioned by the partition wall 512, the first recessed portion A in which the dielectric layer 504 is recessed in the direction of the front glass 501, and the protective layer corresponding thereto. The second depression B is formed and its cross section is formed in a square.

In this case, since the first depression A and the corresponding second depression B are formed in the same number in one discharge cell, the second depression A is formed when one first depression A is formed. One depression B is also formed to correspond to this.

In addition, the first recessed portion A and the second recessed portion B are formed at positions between the scan electrode 502 and the sustain 503 electrode, which are the first electrodes, and are arranged vertically of the first recessed portion A. FIG. The width d _A and the vertical width d _B of the second recess _B are smaller than the distance d between the scan electrode 502 and the sustain 503 electrode.

At this time, the vertical width d _B of the second recessed part _B is smaller than the vertical width d _A of the first recessed part A. FIG.

However, the present disclosure is not limited thereto, and the vertical width d _A of the first depression _A and the vertical width d _B of the second depression _B may include the scan electrodes 502 and the sustain 503 electrodes. It is possible to be formed equal to the interval d between.

Further, it is also possible that the two are equal to the vertical width (d _A) of the dimples (B) vertical width (d _B) and the first recessed portion (A) of the form.

Here, although the first recessed part A and the second recessed part B are formed in one discharge cell, the present invention is not limited thereto, and a plurality of recesses may be formed.

6 is a side view of a front panel illustrating an example in which a plurality of first recesses and second recesses are formed in one discharge cell.

As shown in FIG. 6, three first depressions A ₁ , A ₂ , and A ₃ are formed in one discharge cell, and three second depressions B are correspondingly formed. (B ₁ , B ₂ , B ₃ ) are formed.

As such, the first recessed portion A and the second recessed portion B may be formed in plural in one discharge cell, and the first recessed portion A and the second recessed portion B may be It is formed in the same number, each connected to the adjacent recess in the horizontal direction.

That is, the first depression A ₁ of the first depression A is horizontally connected to the second depression A ₂ and the third depression A ₃ , and the second depression B The first depression B _{1 is} connected to the second depression B ₂ and the third depression B ₃ in the horizontal direction.

Here, although the first recess A includes all of the second recess B as shown in FIGS. 5 and 6, it may be formed differently from this, as illustrated in FIGS. 7A and 7B.

7A and 7B are side views of the front panel for explaining an example in which the first depression includes the second depression.

As shown in FIGS. 7A and 7B, the first recess A may include a part of the second recess B, rather than the whole.

That is, although the 1st recessed part A does not contain the code | symbol e part of the 2nd recessed part B, and only includes the code | symbol f area | region, the 1st recessed part A is the 2nd recessed part B You must also include part of.

In the above description, the first recess A has only a rectangular shape in cross section of the second recess B, but the present invention is not limited thereto. The first recess A may be formed in various shapes. Same as FIG. 8C.

8A to 8C are side views of the front panel showing an example of the shape of the first recessed portion and the second recessed portion.

First, the cross sections of the first recess A and the second recess B as shown in FIG. 8A may be formed in a curvature shape or may have a polygonal shape as shown in FIG. 8B.

In addition, it can be formed in a step shape as shown in Fig. 8c.

In this way, the second depression B is formed in a shape corresponding thereto according to the shape of the first depression A. FIG.

It is possible to have a plurality of protrusions between the first recess A and the second recess B, which is illustrated in FIGS. 9A and 9B.

9A and 9B are side views of a front panel showing an example having respective protrusions between the first depressions and the second depressions.

First, as shown in 9a, a plurality of protrusions A 'and B' are formed between the first depression A and the second depression B. FIG.

That is, the first depression A has a first protrusion A ', and the second depression B has a second protrusion B', thereby forming the first depression A and the first depression A. 2 The recessed portion (B) is further recessed to allow the wall charges to be formed more smoothly during discharge.

At this time, the depth A ' _h of the first protrusion B' is formed higher than the depth A _h of the first depression A, and the depth B ' _h of the second protrusion B' is It is formed higher than the depth B _h of the second depression B.

Alternatively, as shown in FIG. 9B, the depth A ′ _h of the first protrusion B ′ is lower than the depth A _h of the first recess A, and the depth of the second protrusion B ′ ( B ' _h ) is formed to be lower than the depth B _h of the second recess B.

However, the present invention is not limited thereto, and the depth A ′ _h of the first protrusion B ′ is formed to be the same as the depth A _h of the first recess A, and the depth of the second protrusion B ′. (B _'h) is formed the same as the depth _(h B) of the second depressed portions (B).

The position at which the first recessed part A and the second recessed part B are described in more detail will be described with reference to FIG. 10.

10 is a plan view of the front panel showing an example of a position where the first depression is formed.

As shown in FIG. 10, the first depression A is formed between the scan electrode 502 as the first electrode and the sustain electrode 503, and is formed in a direction corresponding to the address electrode 113 as the second electrode, thereby discharging. The wall charges are distributed more efficiently.

As shown in FIG. 11, the discharge and the distribution of wall charges in the plasma display panel in which the first depressions A and the second depressions B are formed are described.

11 is a conceptual diagram illustrating a discharge and wall charge distribution in a plasma display panel according to an exemplary embodiment of the present invention.

As shown in FIG. 11, when a predetermined pulse is applied to the scan electrode 502 and the sustain electrode 503 of the plasma display panel, wall charges are accumulated on the upper portion of the protective layer 505. Discharge is generated.

At this time, the charges having a predetermined amount of charge are collected in the vicinity of the first recessed portion A and the second recessed portion B due to the property of further gathering into the protruding portion. As a result, the potential difference between both ends of the first recess A and the second recess B increases, and as a result, discharge occurs even with a relatively small voltage.

In addition, when the first recessed portion A and the second recessed portion B are formed to be continuous between other adjacent discharge cells, it is possible to expect an effect of improving the exhaust characteristics during the exhaust process of the plasma display panel.

Herein, only the one having a stripe-type partition structure has been described. However, the present invention is not limited thereto, and the same principle can be used for all partition structures such as a lattice partition structure and a triangular partition structure.

In addition, the first depressions A are formed in the dielectric layers 504 and the protective layer 505, and the second depressions B are formed to correspond to the discharge characteristics of the plasma display panel, thereby improving the discharge characteristics. Properties can also be improved.

In addition, since the actual surface area of the protective layer 505 formed of MgO is increased, the amount of discharge of secondary electrons during discharge is increased, thereby further lowering the discharge start voltage.

As such, it will be understood by those skilled in the art that the above-described technical configuration may be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the embodiments described above are to be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the following claims rather than the above description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described in detail above, the present invention has the effect of differentially forming the dielectric and the corresponding protective layer to have one or more depressions, thereby lowering the discharge start voltage and power consumption, and improving the brightness and efficiency. have.

In addition, the amount of discharge of secondary electrons is increased by increasing the actual surface area of the MgO layer, thereby further lowering the discharge start voltage.

In addition, there is an effect that can improve the exhaust characteristics.

Claims (10)

A first substrate on which a first electrode is formed; A dielectric layer formed on the first substrate to cover the first electrode and having at least one first depression; A protective layer covering the dielectric layer and having a second recessed portion corresponding to the first recessed portion; A second substrate having a second electrode formed to intersect the first electrode and disposed to face the first substrate; A partition wall partitioning a plurality of discharge cells between the second substrate and the first substrate, And at least one of the first recessed portion and the second recessed portion in at least one discharge cell of the plurality of discharge cells. The method of claim 1, And the first recessed portion and the second recessed portion are formed between the first electrodes in the discharge cell. The method of claim 1, And the first recessed portion and the second recessed portion are formed in the same number in each discharge cell. The method of claim 1, And a longitudinal width of the first recessed portion and the second recessed portion is less than or equal to a distance between the first electrodes. The method of claim 1, And the vertical width of the first recessed portion is greater than the vertical width of the second recessed portion. The method of claim 1, And a cross section of the first recessed portion and the second recessed portion is one of a polygonal shape or a curvature shape. The method of claim 1, And the first recessed portion is formed to be connected to an adjacent recessed portion in a horizontal direction. The method of claim 1, Among the plurality of discharge cells, the plurality of first depressions in at least one of the discharge cells, And a protrusion is formed between the plurality of first depressions. The method of claim 8, And the height of the protrusion is equal to or lower than the depth of the depression. The method of claim 1, And the first recessed portion and the second recessed portion are formed at positions corresponding to the second electrodes.

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