JP2008027618A - Discharge type display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a discharge type display device capable of being easily manufactured using inexpensive materials. <P>SOLUTION: A discharge type display device is constructed as follows. Bus electrodes 2 are coated with a dielectric layer 3. Discharge spaces 16 are separately formed for each pixel by a lattice-like partition wall 13. Island-shaped electrodes 4 made of conductive materials divided in an island shape are disposed on the surface of the dielectric layer 3 which coats the bus electrode 2. Each island-shaped electrode 4 has at least a portion opposed to the bus electrode 2 and a portion facing to the discharge space 16. The portion opposed to the bus electrode 2 via the dielectric layer 3 is isolated by the partition wall 13 so as not to face to the discharge space 16. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a discharge type display device, for example, a so-called PDP (plasma display panel).

The PDP currently in practical use covers the surface of a pair of striped electrodes extending in parallel with a dielectric such as low-melting glass, and has a high secondary electron emissivity and ion resistance. It is a so-called ACPDP (AC type PDP) which is covered with a MgO layer having excellent impact properties and operates by accumulating wall charges on the surface of these double dielectric layers.
An address electrode for selecting a pixel and a sustain electrode that is a main discharge electrode for light emission are separately arranged on the front and back glass substrates, respectively. A so-called three-electrode surface discharge type ACPDP in which one of them is shared with the sustain electrode is generally used.

In the above-described three-electrode surface discharge type ACPDP, it is general that the barrier ribs are formed in a stripe shape, and the stripe barrier ribs are formed in parallel with the address electrodes.
As another configuration, there has been proposed a configuration in which partition walls are formed in a lattice shape so that a discharge space is separated for each pixel (see, for example, Patent Document 1).

FIG. 10 shows a plan view of the ACPDP having a structure in which the partition walls are formed in a lattice shape.
FIG. 11 is a cross-sectional view taken along line XX in FIG.

As shown in FIG. 11, a dielectric layer 204 is formed on the substrate 201 on the back side so as to cover the transparent electrode 202 and the bus electrode 203, and the entire electrode including the portion facing the AC type discharge electrode, that is, the discharge space, is formed. It is configured to be covered with a dielectric layer. The surface of the dielectric layer 204 is covered with a protective layer 205. The protective layer 205 is made of a material such as MgO having a secondary electron emission function and resistance to ion bombardment.
An address electrode 212 is formed on the substrate 211 on the front side, and a partition wall 213 and a phosphor layer 214 are formed thereon. The barrier ribs 213 are formed in a grid pattern, and the grid-shaped barrier ribs 213 form discharge spaces 216 separated for each pixel as shown in FIG.

  Furthermore, the enlarged view of the principal part of FIG. 11 is shown in FIG. FIG. 12 is an enlarged sectional view of almost one pixel.

Of the surface of the dielectric layer 204, a portion on the discharge space 216 becomes a discharge function portion 252 having a discharge function. Since the discharge function portion 252 has no electrode, the surface of the dielectric layer 204 is covered with a protective layer 205 such as MgO so as to ensure the secondary electron emission function and the ion bombardment resistance. There is a need.
A capacitance having a memory function and defining a discharge current is formed between the transparent electrode 202 on the substrate 201 via the dielectric layer 204. This capacitance is distributed in portions of the transparent electrode 202 and the protective layer 205 that are on the respective discharge spaces 216 to form a capacitance portion (that is, a memory function portion) 251.

  Since the bus electrode 203 is hidden by the partition wall 213 and not on the discharge space 216, no electrostatic capacity necessary for discharge is formed in the bus electrode 203 portion.

Japanese Unexamined Patent Publication No. 2001-183999 (FIG. 1 etc.)

In the conventional configuration shown in FIGS. 10 to 12, the area of the discharge function portion 252 and the area of the capacitance portion 251 are almost the same, and it is necessary to increase the capacitance to increase the luminance. When the area of the capacitance portion 251 is increased, the area of the discharge function portion 252 is also increased.
The discharge function portion 252 is a portion facing the discharge space 216 in the surface of the dielectric layer 204 corresponding to the electrode 202. Therefore, when the area of the discharge function portion 252 is increased, the discharge function portion 252 is on the discharge space 216 of the electrode 202. The part becomes larger.
Therefore, the electrode 202 is required to be as transparent as possible so as not to block light emitted from the phosphor layer 214. By using the electrode 202 as a transparent electrode, the material cost is higher than when a non-transparent conductive material is used for the electrode 202.

Similarly to the electrode 202, the dielectric layer 204, the MgO protective layer 205, and the like formed on the substrate 201 on the back side need to be as transparent as possible.
For this reason, many thin film processes are needed, and the subject on manufacture is large.
In addition, since the MgO protective layer 205 is formed by a vacuum deposition process, the apparatus becomes large and expensive.

  In order to solve the above-described problems, the present invention provides a discharge type display device that can be easily manufactured and that can use inexpensive materials.

  The discharge type display device of the present invention has a structure in which a bus electrode to which current is supplied from the outside of the panel is covered with a dielectric layer to each pixel, and a discharge space separated for each pixel by a grid-like partition is formed. The island-shaped electrode made of a conductive material divided into islands is arranged on the surface of the dielectric layer covering the bus electrode so as to face the bus electrode through the dielectric layer. It has at least a portion facing the bus electrode and a portion facing the discharge space, and the portion facing the bus electrode of the island electrode via the dielectric layer is isolated so as not to face the discharge space by the partition wall It is.

According to the configuration of the above-described discharge display device of the present invention, the bus electrode has a structure covered with the dielectric layer, and the island shape is divided into islands on the surface of the dielectric layer covering the bus electrode. Since the electrode is disposed, this island electrode can be used as the discharge electrode.
Since the island electrode disposed on the surface of the dielectric layer is used as the discharge electrode, the surface of the dielectric layer is not subjected to ion bombardment, and it is not necessary to cover the surface of the dielectric layer with a protective layer such as MgO. Each layer can be formed by a thick film process that is easy to manufacture and inexpensive.

The island-shaped electrode has at least a portion facing the bus electrode and a portion facing the discharge space.
Of these portions, the portion of the island-shaped electrode facing the bus electrode (covered with the dielectric layer) forms a capacitance with the facing bus electrode. That is, this portion of the island-like electrode can be called a capacitance portion that constitutes a capacitance.
Of these portions, the portion facing the discharge space of the island-shaped electrode becomes a discharge electrode and generates a discharge. That is, this portion of the island-like electrode can be called a discharge function portion that generates discharge.

The portion of the island electrode facing the bus electrode (capacitance portion) is isolated so as not to face the discharge space by the grid-like partition wall, so that the capacitance portion of the island electrode is discharged. Does not contribute.
Therefore, the electrostatic capacity portion and the discharge function portion can be separated by the island-shaped electrode having such a configuration.

In the present invention, the island-like electrode may be made of a material different from each other in a portion facing the bus electrode (capacitance portion) and a portion facing the discharge space (discharge function portion). is there.
In this case, it is easy to form a pattern in a portion (capacitance portion) facing the bus electrode, and a material having good conductivity can be used. Examples of such materials include metal conductive materials such as Ag, Au, Cr, and Cu, and transparent conductive materials such as ITO (indium tin oxide).
In addition, a portion that faces the discharge space (discharge function portion) can be made of a material that is conductive, has a high secondary electron emissivity, and is resistant to ion bombardment. Examples of such a material include LaB6 (lanthanum hexaboride), carbon nanotube, nickel, and the like.
Thus, by using different materials for the part facing the bus electrode (capacitance part) and the part facing the discharge space (discharge function part), the material is optimized according to the function of each part. can do.
In addition, the junction part of a discharge function part and an electrostatic capacitance part may overlap the one part or all part.

In the present invention, the portion of the island electrode facing the bus electrode (capacitance portion) and the portion of the island electrode facing the discharge space (discharge function portion) are connected via another portion. It is also possible to configure an island-shaped electrode and prevent other portions of the island-shaped electrode from reaching the discharge space by the lattice-shaped barrier ribs.
In this case, since a current for discharge can flow between the capacitance portion and the discharge function portion via the other portion of the island-like electrode, this portion can be called a current introduction portion.
Then, by preventing the current introduction portion from facing the discharge space by the partition walls, a pattern can be easily formed and a material having good conductivity can be used. Examples of such materials include metal conductive materials such as Ag, Au, Cr, and Cu, and transparent conductive materials such as ITO (indium tin oxide).
Further, by adjusting the length of the current introduction part and the length of the discharge function part, it is possible to adjust the interval between the discharge function parts, that is, the length of the gap of the discharge electrode.
In this configuration as well, a part or all of the junction between the discharge function portion and the capacitance portion may overlap.

According to the present invention described above, since it is not necessary to cover the surface of the dielectric layer with a protective layer such as MgO, each layer can be formed by a thick film process that is easy to manufacture and inexpensive.
Furthermore, since the electrostatic capacitance portion and the discharge function portion can be separated by the island-shaped electrode, the capacitance portion can be increased in area to ensure sufficient electrostatic capacity for the discharge current, and the discharge It is possible to make the area of the functional portion small. As a result, the area of the discharge function portion can be reduced, and the area of the portion facing the discharge space of the island-like electrode can be reduced.
If the area of the island-shaped electrode facing the discharge space is reduced, it becomes unnecessary to use this portion as a transparent electrode, so that an inexpensive conductive material can be used.
Therefore, according to the present invention, it is possible to realize a discharge type display device that is easy to manufacture and inexpensive.

Furthermore, since it is not necessary to use a transparent electrode for the portion of the island electrode facing the discharge space, the degree of freedom in selecting the material for the island electrode is increased. For the island-shaped electrode, for example, a material having good conductivity or a material having secondary electron radiation and ion bombardment resistance can be used.
Therefore, it is possible to optimize the material of the island-shaped electrode so that good characteristics can be obtained at each portion.

  In addition, since the area of the island-shaped electrode facing the discharge space can be reduced, the gap between the discharge function portions of the island-shaped electrode can be widened to increase the gap of the discharge electrode. Thereby, the positive column discharge by a long gap is attained, and luminous efficiency can be improved.

FIG. 1 shows a schematic configuration diagram (plan view) of an embodiment of a discharge type display device of the present invention. Further, FIG. 2 shows a cross-sectional view taken along the line AA of FIG.
A bus electrode 2 for supplying current to each pixel from the outside of the panel is formed as a pair of parallel lines on the substrate 1 on the back side. The bus electrode 2 is covered with a dielectric layer 3 such as low melting point glass.

An address electrode 12 is formed on the front substrate 11, and a partition wall 13 is formed on the address electrode 12. Although not shown in the plan view of FIG. 1, the address electrodes 12 are formed in stripes in a direction orthogonal to the bus electrode 2, that is, in the left-right direction in FIGS.
In addition, the barrier ribs 13 are formed in a grid shape, and the grid-shaped barrier ribs 13 form discharge spaces 16 separated for each pixel.
A phosphor layer 14 is formed on the side wall surface (side surface of the partition wall 13) and the bottom surface of the discharge space 16.

Since the bus electrode 2 is not formed on the discharge space 16, the bus electrode 2 does not need to be a transparent electrode.
Therefore, it is possible to use an inexpensive electrode material or an electrode material having a low resistivity for the bus electrode 2. When an electrode material having a low resistivity is used for the bus electrode 2, there is an advantage that the resistance value is lowered even with a thin film.

In the present embodiment, in particular, a conductive island electrode 4 is formed on the surface of the dielectric layer 3.
The island-like electrodes 4 are formed independently for each pixel, and a total of two island electrodes 4 are arranged on the left and right sides of the discharge space 16 of each pixel.
The island-like electrode 4 has a T shape in plan, and has a portion parallel to the bus electrode 2 and a portion protruding in a direction perpendicular to the bus electrode 2. The portion of the island electrode 4 parallel to the bus electrode 2 faces the bus electrode 2 with the dielectric layer 3 interposed therebetween. A portion of the island electrode 4 protruding in a direction perpendicular to the bus electrode 2 faces the discharge space 16.

As a material for the island-like electrode 4, a so-called cathode material, for example, lanthanum hexaboride (LaB ₆ ), which is conductive and has good secondary electron emissivity and ion bombardment resistance, is used.

Of the conductive island-like electrode 4 independent for each pixel, a portion protruding in a direction perpendicular to the bus electrode 2 is a discharge electrode. That is, this portion of the island electrode 4 is a discharge function portion 52.
Capacitance is formed in the dielectric layer 3 in a portion sandwiched between the island-like electrode 4 and the bus electrode 2 facing each other. That is, this portion of the dielectric layer 3 is a capacitance portion 51.
The capacitance portion 51 has a memory function, like the capacitance portion 251 having the conventional configuration shown in FIG.

  In the conventional configuration shown in FIG. 10, the electrostatic capacitance is distributed over the entire area of the discharge function portion 252, whereas in the configuration of the present embodiment, the capacitance is sandwiched between the island electrode 4 and the bus electrode 2. It is a centralized type where the capacitance is defined by the area of the portion.

The charge accumulated in the capacitance is all discharged from the discharge function portion 52 as a discharge current.
In the configuration of the present embodiment, since the island-like electrode 4 serving as the discharge electrode is conductive, the discharge current is guided to the discharge function portion 52 at the tip. It can be hidden from 16 and separated from the discharge function portion 52.

  In the configuration of the present embodiment, since the conductive island electrode 4 is provided on the surface of the dielectric layer 3 to form a discharge electrode, the surface of the dielectric layer 3 is not subjected to ion bombardment. This eliminates the need to cover the surface of the dielectric layer 3 with a protective layer such as MgO, and thus has an advantage that it can be formed by an inexpensive thick film process.

  Further, in the configuration of the present embodiment, since the electrostatic capacitance portion 51 that forms the electrostatic capacitance and the discharge function portion 52 that generates the discharge are separated, the electrostatic capacitance for a sufficient discharge current. The discharge area can be minimized while ensuring.

In the conventional configuration shown in FIGS. 10 to 12, the area of the discharge function portion 252 and the area of the capacitance portion 251 are the same. Therefore, in order to sufficiently secure the capacitance, the discharge function portion 252 is used. However, since a certain area or more is required, it is necessary to form the electrode 202 in a wide area.
Further, since the electrode 202 is formed on the discharge space 216, it is an absolute condition that the electrode 202 is transparent.
In the conventional configuration shown in FIGS. 10 to 12, the transparent electrode 202 is widely covered in a T shape on the discharge space 216. This is because the portion of the transparent electrode 202 parallel to the bus electrode 203 is formed so as to protrude beyond the discharge space 216 side from the edge 215 of the discharge space 216 (which substantially coincides with the edge of the partition wall 213). .

On the other hand, in this embodiment, the island-like electrode 4 extends in a rod shape on the discharge space 16, and the area of the island-like electrode 4 on the discharge space 16 is the same as that shown in FIGS. It is smaller than the configuration.
Thereby, even if the island-like electrode 4 is not a transparent electrode, it is possible to prevent the light emission from the phosphor layer 14 from being disturbed so much.
In order to obtain this effect, the electrostatic capacity portion 51 of the island electrode 4 facing the bus electrode 2 does not extend over the discharge space 16, but the edge of the discharge space 16 (in the cross-sectional structure of FIG. It is desirable to move back 15 or the edge 15 of the discharge space 16.
And since it becomes unnecessary to make the island-like electrode 4 a transparent electrode, it becomes possible to use an inexpensive conductive material.
Therefore, it is possible to realize a discharge type display device that is easy to manufacture and inexpensive.

When the pixel size is extremely small, for example, 0.2 mm x 0.6 mm, the conventional configuration ensures a long gap (for example, 0.3 mm or more) while ensuring a sufficient capacitance for a discharge current. I can't do it.
On the other hand, according to the configuration of the present embodiment, the area of the discharge electrode (island electrode 4) can be reduced, so that the interval between the left and right island electrodes 4 in the figure on the discharge space 16 is reduced. It is possible to further expand d and increase the gap of the discharge electrode 4.
This also makes it possible to ensure both a sufficient capacitance and a long gap.
Therefore, a positive column discharge by a long gap is possible, so that the light emission efficiency can be improved.

  1 to 3, the distance d between the left and right island-shaped electrodes 4 is substantially the same as the distance between the transparent electrodes 202 in FIGS. 10 to 12. However, in the configuration of the present embodiment, the discharge electrodes (islands) Since the area of the electrode 4) can be reduced, the distance d between the left and right island electrodes 4 can be made larger than the distance between the transparent electrodes 202 in FIGS. It is possible to increase the gap d by increasing the gap d.

  Next, FIG. 4 shows a schematic configuration diagram (plan view) of another embodiment of the discharge type display device of the present invention. FIG. 5 is a cross-sectional view taken along line BB in FIG. Further, FIG. 6 shows an enlarged cross-sectional view of the main part (approximately one pixel) in FIG.

In the present embodiment, in particular, the capacitance portion 4A and the discharge function portion 4B of the island-like electrode 4 are configured using different materials. The planar shape obtained by combining the two portions 4A and 4B is a T shape similar to that of the island electrode 4 of the previous embodiment.
In this way, by using different materials for the two portions 4A and 4B, it is possible to use a material having good conductivity for the capacitance portion 4A, and for the discharge function portion 4B. A material having a high secondary electron emissivity and resistance to ion bombardment can be used.
Note that the capacitance portion 4A and the discharge function portion 4B are connected to each other such that the capacitance portion 4A is arranged on the dielectric layer 3 side, and the discharge function portion 4B is formed so as to overlap with these portions 4A and 4B. May be connected to each other.

  Other configurations are the same as those of the previous embodiment shown in FIGS.

The discharge function portion 4B of the island-like electrode 4 is exposed to the discharge space 16 and is subjected to ion bombardment due to the discharge. For example, LaB ₆ (lanthanum hexaboride), carbon nanotube, nickel, etc. It is desirable to use a material that is excellent and has ion bombardment resistance.
On the other hand, since the electrostatic capacitance portion 4A of the island-like electrode 4 is not exposed to the discharge space 16, the property as a discharge electrode is not necessary. Therefore, a material that is excellent in conductivity and easily forms a pattern, for example, a conductive material such as Ag, Au, Cr, or Cu, or a transparent conductive material such as ITO (indium tin oxide) is used.

According to the above-described present embodiment, the island-like electrode 4 is provided on the surface of the dielectric layer 3 as the discharge electrode as in the previous embodiment shown in FIGS. 3 is not subjected to ion bombardment, and it is not necessary to cover the surface of the dielectric layer 3 with a protective layer such as MgO, so that it can be formed by an inexpensive thick film process.
Further, since the electrostatic capacitance portion 51 by the electrostatic capacitance portion 4A of the island-like electrode 4 and the discharge functional portion 52 by the discharge functional portion 4B of the island-like electrode 4 are separated, a sufficient discharge current can be obtained. The discharge area can be minimized while securing the capacitance.
And since it becomes unnecessary to make the whole island-like electrode 4 into a transparent electrode, it becomes possible to use an inexpensive electroconductive material for the island-like electrode 4 (4A, 4B).
Therefore, it is possible to realize a discharge type display device that is easy to manufacture and inexpensive.
Furthermore, since the area of the discharge electrode (the discharge function portion 4B of the island electrode 4) can be reduced, the interval between the left and right island electrodes 4 (4B) in the drawing on the discharge space 16 is further increased. The gap between the discharge electrodes can be increased. This also makes it possible to ensure both a sufficient capacitance and a long gap. And since the positive column discharge by a long gap is attained, luminous efficiency can be improved.

  Further, according to the present embodiment, the electrostatic capacity portion 4A and the discharge function portion 4B of the island-like electrode 4 are configured using different materials, so that the materials of the respective portions 4A and 4B are formed. Can be optimized. That is, the electrostatic capacity portion 4A can be made of a material that is excellent in conductivity and easy to form a pattern, and the discharge function portion 4B is excellent in secondary electron radiation and has an ion impact resistance. The material it has can be used.

  Next, a schematic configuration diagram (plan view) of still another embodiment of the discharge type display device of the present invention is shown in FIG. Further, FIG. 8 shows a cross-sectional view taken along the line CC of FIG. Further, FIG. 9 shows an enlarged cross-sectional view of a main part (approximately one pixel) in FIG.

In the present embodiment, in particular, the electrostatic capacity portion and the discharge function portion of the island-like electrode 4 are completely separated.
Specifically, the electrostatic capacitance portion 4C of the island electrode and the discharge function portion 4D are connected via the current introduction portion 4E therebetween. The capacitance portion 4C and the discharge function portion 4D are formed in parallel, and the current introduction portion 4E is formed at right angles to these portions 4C and 4D. The electrostatic capacitance portion 4C and the current introduction portion 4E are hidden by the partition wall 13 so as not to reach the discharge space 16.

With this configuration, the discharge interval can be optimized and the light emission area can be increased while minimizing the discharge electrode area.
For example, by adjusting the length of the current introduction portion 4E and the length of the discharge function portion 4D, the distance between the two discharge electrodes (discharge function portion 4D of the island electrode 4) facing the discharge space 16 of the same pixel is adjusted. The (gap) can be optimized.

In the configuration of the present embodiment, the materials of the portions 4C, 4D, and 4E of the island-like electrode 4 can be made different as in the previous embodiment shown in FIGS.
A material can be selected for the capacitance portion 4C and the current introduction portion 4E regardless of discharge. Therefore, it is possible to use a material that is excellent in conductivity and easy to form a pattern, for example, a conductive material such as Ag, Au, Cr, or Cu, or a transparent conductive material such as ITO (indium tin oxide).
For the discharge function portion 4D, a material having excellent secondary electron radiation and ion bombardment resistance, such as LaB ₆ (lanthanum hexaboride), carbon nanotube, nickel, etc. can be used.

According to the above-described present embodiment, the island-like electrode 4 is provided on the surface of the dielectric layer 3 as the discharge electrode as in the previous embodiment shown in FIGS. 3 is not subjected to ion bombardment, and it is not necessary to cover the surface of the dielectric layer 3 with a protective layer such as MgO, so that it can be formed by an inexpensive thick film process.
Further, since the electrostatic capacitance portion 51 by the electrostatic capacitance portion 4C of the island-like electrode 4 and the discharge functional portion 52 by the discharge functional portion 4D of the island-like electrode 4 are completely separated, a sufficient discharge current can be obtained. Therefore, it is possible to minimize the discharge area while ensuring the capacitance.
And since it becomes unnecessary to make the whole island-like electrode 4 a transparent electrode, it becomes possible to use an inexpensive conductive material for the island-like electrode 4 (4C, 4D, 4E).
Therefore, it is possible to realize a discharge type display device that is easy to manufacture and inexpensive.
Furthermore, since the area of the discharge electrode (the discharge function portion 4D of the island electrode 4) can be reduced, the interval between the left and right island electrodes 4 (4D) in the drawing on the discharge space 16 is further increased. The gap between the discharge electrodes can be increased. This also makes it possible to ensure both a sufficient capacitance and a long gap. And since the positive column discharge by a long gap is attained, luminous efficiency can be improved.

  In addition, when the electrostatic capacitance portion 4C, the current introduction portion 4E, and the discharge function portion 4D of the island-like electrode 4 are configured using different materials, the materials of the respective portions 4C, 4D, and 4E are optimal. Can be

The positional relationship between the island-shaped electrode and the bus electrode and the size relationship between the electrode widths are not limited as in the above-described embodiments, and other configurations are possible in the present invention.
Either the island electrode or the bus electrode may be wide or the same width.
In each of the above-described embodiments, the electrostatic capacitance portion of the island-shaped electrode 4 is opposed to the substantially center of the bus electrode 2. It may be shifted to the discharge space side or to the opposite side of the discharge space.
Since the capacitance varies depending on the width of the island electrode and the bus electrode facing each other, if the capacitance is to be increased, the width of the facing may be increased.
Furthermore, in each of the above-described embodiments, the edge of the bus electrode 2 is set to the same planar position as the edge of the partition wall 13, but these edges may not be the same planar position.
If an opaque bus electrode is placed on the discharge space, the display area is hidden by the bus electrode. Therefore, when an opaque material is used for the bus electrode, The edge of the bus electrode is located inside the edge of the bus.

Further, the shape of the island-shaped electrode is not limited to the T-shape of each of the above-described embodiments.
For example, a configuration in which the discharge function portion is formed obliquely with respect to the bus electrode and the capacitance portion is also possible.
For example, a configuration in which the discharge function portion has a shape other than a rectangle (such as a trapezoidal shape, a triangular shape, or a shape with rounded corners) is also possible.
In addition, when the island-shaped electrode is T-shaped, there is an advantage that patterning is easy.

  The present invention is not limited to the configurations of the above-described embodiments, and various other configurations can be taken without departing from the gist of the present invention.

1 is a schematic configuration diagram (plan view) of an embodiment of a discharge type display device of the present invention. It is sectional drawing in AA of FIG. It is an expanded sectional view of the principal part of FIG. It is a schematic block diagram (plan view) of another embodiment of the discharge type display device of the present invention. It is sectional drawing in BB of FIG. It is an expanded sectional view of the principal part of FIG. It is a schematic block diagram (plan view) of further another embodiment of the discharge type display device of the present invention. It is sectional drawing in CC of FIG. It is an expanded sectional view of the principal part of FIG. It is a top view of ACPDP of the structure which formed the partition in the grid | lattice form. It is sectional drawing in XX of FIG. It is an expanded sectional view of the principal part of FIG.

Explanation of symbols

1 (back side) substrate, 2 bus electrodes, 3 dielectric layers, 4 island-like electrodes, 4A, 4C (island-like electrode) capacitance part, 4B, 4D (island-like electrode) discharge function part, 4E Current-introducing portion of island electrode, 11 (front side) substrate, 12 address electrode, 13 partition, 14 phosphor layer, 16 discharge space, 51 capacitance portion, 52 discharge function portion

Claims (5)

A discharge display device having a structure in which a bus electrode to which current is supplied to each pixel from the outside of the panel is covered with a dielectric layer,
The grid-shaped barrier ribs form discharge spaces separated for each pixel,
On the surface of the dielectric layer covering the bus electrode, an island-shaped electrode divided into islands and made of a conductive material is disposed so as to face the bus electrode via the dielectric layer,
The island electrode has at least a portion facing the bus electrode and a portion facing the discharge space,
A portion of the island electrode facing the bus electrode through the dielectric layer is isolated by the partition so as not to face the discharge space.   2. The discharge type display device according to claim 1, wherein the island-shaped electrode is made of different materials for a portion facing the bus electrode and a portion facing the discharge space.   A material having good conductivity is used for the portion of the island electrode facing the bus electrode, and the portion facing the discharge space of the island electrode is conductive and has a high secondary electron emissivity. The discharge type display device according to claim 2, wherein a material having resistance to ion bombardment is used.   A portion of the island electrode facing the bus electrode and a portion of the island electrode facing the discharge space are connected via another portion to form the island electrode, and the other portion. 2. The discharge type display device according to claim 1, wherein the discharge type display device is isolated so as not to face the discharge space by the barrier ribs.   A material having good conductivity is used for the portion of the island electrode facing the bus electrode and the other portion, and the portion of the island electrode facing the discharge space is conductive and secondary. 5. The discharge type display device according to claim 4, wherein a material having high electron emissivity and resistance to ion bombardment is used.

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