JP2001283737A - Plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display panel capable of preserving enough discharge area and a coating area for a phosphor along with improving its intensity. SOLUTION: A plasma display panel is composed in the following way: a front substrate 1 comprising an electrode for scanning 5 and a common electrode 6 and a back substrate 10 comprising an electrode for data 11 are sealed in the position that they are facing each other, and plural discharge cells 14 held in matrix-like within the sealed space are prepared. To eject the electrode for scanning 5 and the common electrode 6 arranged in the front substrate 1 within the discharge cell 14, an insulating protrusion portion 3 is arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel used for an information display terminal, a flat panel television, and the like, and more particularly, to a structure of a plasma display panel.

[0002]

2. Description of the Related Art Among AC plasma display panels, in particular, a scanning electrode and a common electrode are formed on a front substrate which is one substrate, and a data electrode is formed on a rear substrate which is the other substrate. The data electrode and the scan electrode are driven to perform a write discharge for selecting a unit cell to be displayed, while the scan electrode and the common electrode are driven to perform a sustain discharge by surface discharge of the selected unit cell. In the three-electrode surface discharge type plasma display panel, high-energy ions generated at the time of surface discharge on the front substrate do not impact and degrade the phosphor formed on the rear substrate.
For this reason, the service life can be extended, and it is widely used.

FIG. 11 is a perspective view showing the structure of a conventional AC type three-electrode surface discharge type plasma display panel, and FIG.
Is a cross-sectional view taken along the line EE in FIG. 11, and FIG.
It is arrow F sectional drawing. As shown in FIGS. 11 to 13, the conventional plasma display panel includes a front substrate 1 made of a transparent substrate, a scanning electrode 22 made of a transparent electrode 19a and a metal electrode 2a, and a transparent electrode 19b and a metal electrode 2b. A common electrode 23 is formed.
Are covered with a dielectric layer 7 a and further covered with a protective layer 8.

On the other hand, a data electrode 11 is formed on a rear substrate 10 made of a transparent substrate, and the data electrode 11 is covered with a dielectric layer 7b. The partition 12 is formed on the dielectric layer 7b located between the data electrodes 11, and the dielectric layer 7b
Phosphors 13R, 13G, and 13B that emit light of the three primary colors of red, green, and blue are alternately applied on the surface and the side surfaces of the partition wall 12. The front substrate 1 and the rear substrate 10 are assembled integrally with each other so that the scanning electrodes 22 and the common electrodes 23 and the data electrodes 11 are opposed to each other so as to be orthogonal to each other. The generated gas is sealed.

[0005] In the above-described conventional plasma display panel, ultraviolet light is generated by the discharge between the electrodes, and the ultraviolet light excites the phosphor to emit visible light.

[0006]

However, in the conventional plasma display panel, the size of the unit cell 14 becomes smaller as the display screen becomes higher definition.
There is a problem that the luminance decreases because the discharge area and the phosphor application area decrease.

In a conventional plasma display panel in which the size of the unit cell 14 is not relatively small,
Improving brightness is one of the major issues.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a novel plasma display in which a discharge area and a phosphor application area are sufficiently ensured and luminance is improved. Panels are provided.

[0009]

SUMMARY OF THE INVENTION The present invention basically employs the following technical configuration to achieve the above object.

That is, in a first aspect of the plasma display panel according to the present invention, a front substrate provided with a scanning electrode and a common electrode and a rear substrate provided with a data electrode are disposed so as to face each other and sealed. In a plasma display panel in which a plurality of discharge cells arranged in a matrix in a sealed gap are formed, a projecting portion for projecting a scan electrode and a common electrode provided on the front substrate into the discharge cell is provided. It is characterized by having been provided.

In a second aspect, a front substrate provided with a scanning electrode and a common electrode and a rear substrate provided with a data electrode are disposed so as to face each other and sealed, and a matrix is formed in the sealed gap. In the plasma display panel formed with a plurality of disposed discharge cells, a projection is provided for projecting a scan electrode and a common electrode provided on the front substrate into the discharge cell, and the projection is provided on the projection. The scanning electrode and the common electrode are extended.

According to a third aspect, the projection is formed of an insulating material, and in a fourth aspect, the projection is formed of a metal material. It is a feature.

A fifth aspect is characterized in that the projecting portion projects into the discharge cell along the data electrode, and a sixth aspect is that the projection is provided on the back substrate. The partition wall to be formed is formed to be higher in proportion to the height of the protrusion.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A plasma display panel according to the present invention is characterized in that a front substrate provided with a scanning electrode and a common electrode and a rear substrate provided with a data electrode are opposed to each other and sealed. A plasma display panel having a plurality of discharge cells arranged in a matrix in the gaps provided, wherein a projection is provided for projecting a scan electrode and a common electrode provided on the front substrate into the discharge cells. It is characterized by the following.

With such a configuration, the scanning electrode and the common electrode of each unit cell can be extended in the direction of the rear substrate by the protrusion, so that the electrode area increases and the discharge area increases.

Further, since the partition walls are formed higher in proportion to the height of the protruding portions, the phosphor application area increases. Therefore,
Since the discharge area and the phosphor application area increase, and the conventional discharge along the phosphor on the dielectric layer becomes discharge along the phosphor on the side wall of the partition wall, the luminance can be improved.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIGS. 1 to 5 are diagrams for explaining a first embodiment. FIG. 1 is a perspective view showing a structure of a plasma display panel according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG.
FIG. 2 is a cross-sectional view taken along the line BB of FIG. 1. In these figures, a front substrate 1 provided with a scanning electrode 5 and a common electrode 6 and a rear substrate 10 provided with a data electrode 11 are opposed to each other. In a plasma display panel in which a plurality of discharge cells 14 arranged in a matrix in the sealed gap are formed, the scanning electrode 5 and the common electrode 6 provided on the front substrate 1 are connected to each other. There is shown a plasma display panel characterized in that a projection for projecting into a discharge cell 14 is provided, and a front substrate 1 provided with a scanning electrode 5 and a common electrode 6 and a data electrode 11 are provided. And a plurality of discharge cells 14 arranged in a matrix in the sealed gap. A plasma display, wherein a projection for projecting the scanning electrode 5 and the common electrode 6 into the discharge cell 14 is provided, and the scanning electrode 5 and the common electrode 6 are extended on the projection. A panel is shown and the projection is formed of an insulating material.

Hereinafter, the first embodiment will be described in more detail.

As shown in FIGS. 1 to 3, the scanning electrode 5 and the common electrode 6 are formed on a front substrate 1 made of, for example, a transparent substrate such as soda lime glass, and are arranged along the row direction H of the screen. For example, they are arranged alternately and in parallel. The scanning electrode 5 and the common electrode 6 include metal electrodes 2a and 2b made of, for example, copper, silver, aluminum, etc., and ITO (Indium Tin Oxid).
e), a transparent electrode 4a, 4b of tin oxide (NESA) or the like, and an insulating protrusion made of zinc-containing frit glass, lead-containing frit glass, etc. between the metal electrode 2 and the transparent electrode 4 for each unit cell 14. 3 is formed along the data electrode. The scanning electrode 5 and the common electrode 6 are covered with a dielectric layer 7a made of zinc-containing frit glass, lead-containing frit glass, or the like, and further covered with a protective layer 8 made of, for example, MgO (magnesium oxide).

The rear substrate 10 has a source similar to the front substrate 1.
The back substrate 1 is made of a transparent substrate such as lime glass.
Data electrode 11 made of copper, silver, aluminum, etc.
Are arranged along the column direction V of the screen so as to be orthogonal to the scanning electrodes 5 and the common electrodes 6. The data electrode 11 is covered with a dielectric layer 7b made of zinc-containing frit glass, lead-containing frit glass, or the like. For example, a lead-containing frit glass is formed on the dielectric layer 7b between adjacent data electrodes 11. Is formed. Then, phosphors 13R, 13G, and 13B that emit light of three primary colors of red, green, and blue are alternately applied on the surface of the dielectric layer 7b and the side surface of the partition wall 12. A well-known material can be used for each phosphor 13. As the phosphor for red, for example, (Y, Ga) B
O ₃ : Eu is, for example, Zn ₂ S as a green phosphor.
iO ₄ : Mn is a phosphor for blue, for example, BaM
gAl ₁₄ O ₂₃ : Eu is used respectively.

The front substrate 1 and the rear substrate 10 are assembled integrally in such a manner that the scanning electrode 5, the common electrode 6, and the data electrode 11 face each other so as to be orthogonal to each other. Is filled with a gas for generating ultraviolet light which generates ultraviolet light by electric discharge. As the ultraviolet ray generating gas, for example, a mixed gas of Ne and Xe, a mixed gas of He, Ne, and Xe, and the like are used.

According to the above configuration, the unit cell 14
Since each transparent electrode 4 can be extended in the direction of the rear substrate 10 by the insulating protrusion 3, the electrode area increases and the discharge area increases. Further, since the partition wall 12 is formed to be higher in proportion to the height of the insulating protrusion 3, the phosphor application area increases. Accordingly, the discharge area and the phosphor application area increase, and in addition to the conventional discharge along the phosphor on the dielectric layer 7b, the partition walls 12
Since a discharge is also generated along the phosphor on the side surface, the luminance can be improved.

In the first embodiment, as shown in FIGS. 1 to 3, the insulating protrusions 3 are formed in an island shape for each unit cell 14, but are formed as strip-shaped insulating protrusions connected in the column direction V of the screen. It may be formed. Further, the transparent electrode 4 is formed in an island shape for each unit cell 14, but may be formed in a band shape or a comb shape connected in the row direction H of the screen. Further, when the insulating protrusions 3 are in the form of islands, it is preferable that the partition walls 12 are formed in a grid pattern.
When the insulating protruding portion 3 has a band shape, it is preferable that the partition wall 12 is formed in a band shape.

The insulating projection 3, metal electrode 2, and transparent electrode 4 of the plasma display panel of the first embodiment are manufactured by the method shown in FIG. FIG. 4 illustrates a cross section taken along the line AA and a cross section taken along the line BB of FIG. Front substrate 1
After the metal electrode 2 is formed by an etching method, an additive method, or the like, the insulating protrusion 3 is formed by an etching method, an additive method, or the like. Next, the transparent electrode 4 is formed by an etching method, an additive method, or the like.

In the above-described manufacturing method, as shown in FIG. 5, after the insulating protrusion 3 is formed on the front substrate 1 by an etching method, an additive method or the like, a transparent electrode 4 is formed by an etching method, an additive method or the like. Next, the metal electrode 2 may be formed by an etching method, an additive method, or the like.

(Second Embodiment) FIGS. 6 to 10 are views for explaining a second embodiment. 6 is a perspective view showing a structure of a plasma display panel according to a second embodiment, FIG. 7 is a sectional view taken along the line CC of FIG. 6, and FIG. 8 is a sectional view taken along the line DD of FIG. is there. As shown in FIGS. 6 to 8,
The scanning electrodes 15 and the common electrodes 16 are formed on the front substrate 1 made of, for example, a transparent substrate such as soda lime glass, and are arranged, for example, alternately and in parallel along the row direction H of the screen. The scanning electrode 15 and the common electrode 16 include metal electrodes 2a and 2b made of, for example, copper, silver, and aluminum, and metal protrusions 17a and 17b, and have a configuration in which the metal protrusion 17 is formed for each unit cell 14. The scanning electrode 15 and the common electrode 16 are covered with a dielectric layer 7a made of zinc-containing frit glass, lead-containing frit glass, or the like,
Furthermore, it is covered with a protective layer 8 made of, for example, MgO (magnesium oxide).

The back substrate 10 has a source similar to the front substrate 1.
The back substrate 1 is made of a transparent substrate such as lime glass.
Data electrode 11 made of copper, silver, aluminum, etc.
Are arranged along the column direction V of the screen so as to be orthogonal to the scanning electrodes 15 and the common electrodes 16. The data electrode 11
On the dielectric layer 7b covered with a dielectric layer 7b made of zinc-containing frit glass, lead-containing frit glass or the like, and between the adjacent data electrodes 11, a partition wall 12 made of, for example, lead-containing frit glass or the like is formed. Is done. Then, phosphors 13R, 13G, and 13B that emit light of three primary colors of red, green, and blue are alternately applied on the surface of the dielectric layer 7b and the side surface of the partition wall 12. A well-known material can be used for each phosphor 13. As the phosphor for red, for example, (Y, Ga) B
O ₃ : Eu is, for example, Zn ₂ S as a green phosphor.
iO ₄ : Mn is a phosphor for blue, for example, BaM
gAl ₁₄ O ₂₃ : Eu is used respectively.

The front substrate 1 and the back substrate 10 are connected to the scanning electrodes 1.
5 and the common electrode 16 and the data electrode 11 are assembled so as to face each other so as to be orthogonal to each other, and a discharge space 9 between the partition walls 12 is filled with a gas for generating ultraviolet light which generates ultraviolet light by discharge. . As the ultraviolet ray generating gas, for example, a mixed gas of Ne and Xe, a mixed gas of He, Ne, and Xe, and the like are used.

According to the above configuration, the unit cell 14
Each metal electrode 2 is connected to the rear substrate 10 by the metal protrusion 17.
Since it can be extended in the direction, the electrode area increases and the discharge area increases. Further, since the partition wall 12 is formed to be higher in proportion to the height of the metal protrusion 17, the phosphor application area increases.
Accordingly, the discharge area and the phosphor application area increase, and in addition to the conventional discharge along the phosphor on the dielectric layer 7b, a discharge along the phosphor on the side surface of the partition wall 12 is generated, thereby improving the brightness. I can do it.

FIG. 9 shows a modification of the scanning electrode 15 and the common electrode 16 in the second embodiment. Transparent electrodes 19a, 1
9b, the metal electrodes 2a, 2b and the metal protrusion 1
7a and 17b are formed, and the scan electrode 20 and the common electrode 21 are formed.
And In this modification, the number of light-shielding portions formed by the metal electrodes in the unit cell 14 is reduced, and the aperture ratio is improved.

In the second embodiment, as shown in FIGS. 6 to 9, the portion of the dielectric layer 7a that covers the metal protrusion 17 is formed in an island shape for each unit cell 14, but the column direction V May be formed as a strip-shaped protruding dielectric layer connected to. Further, when the protrusion of the dielectric layer at the portion covering the metal protrusion 17 is in the shape of an island, it is preferable that the partition wall 12 be formed in a grid pattern.
When the protrusion of the dielectric layer covering the metal protrusion 17 is band-shaped, the partition wall 12 is preferably formed in a band shape.

The metal projection 17, the metal electrode 2, and the dielectric layer 7a of the plasma display panel of the second embodiment are the same as those shown in FIG.
0. FIG. 10 illustrates a cross section taken along line CC and a cross section taken along line DD of FIG. 6.
After the metal electrode 2 is formed on the front substrate 1 by an etching method, an additive method or the like, a dielectric layer 7a is deposited, and a concave portion 18 is formed in the dielectric layer 7a by an etching method or the like.
After that, the concave portion 18 is embedded with the metal protrusion 17, and further,
After depositing the dielectric layer 7a, the dielectric layer 7a is formed into a predetermined shape by an etching method or the like.

As described above, in the second embodiment, the protruding portion is formed of a metal material or a metal electrode.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and there may be changes in the design without departing from the gist of the present invention. Are also included in the present invention. For example, the shape of the insulating protrusion 3 is not particularly limited in the present invention,
In addition to the island shape and the band shape as in the present embodiment, the shape may be a comb shape or a plurality of island shapes. The shape of the metal projection 17 is
The present invention is not particularly limited, and may be a column or a plurality of islands other than the rectangular parallelepiped as in the present embodiment.

[0036]

As described above, according to the structure of the plasma display panel of the present invention, the scanning electrode and the common electrode in each unit cell extend in the direction of the back substrate, and the projection is formed. In addition, the electrode area and the discharge area increase. Further, since the partition walls are formed higher in proportion to the height of the protruding portions, the phosphor application area increases. Therefore, the discharge area and the phosphor application area increase, and in addition to the conventional discharge along the phosphor on the dielectric layer, a discharge along the phosphor on the side wall of the partition is also generated, thereby improving the brightness. An implemented plasma display panel is provided.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a diagram illustrating a manufacturing process of a scanning electrode and a common electrode of the plasma display panel according to the first embodiment of the present invention.

FIG. 5 is a diagram showing a modification of FIG. 4;

FIG. 6 is a perspective view of a plasma display panel according to a second embodiment of the present invention.

FIG. 7 is a sectional view taken along the line CC of FIG. 6;

FIG. 8 is a sectional view taken along the line DD in FIG. 6;

FIG. 9 is a view showing a modification of the scanning electrodes and the common electrodes of the plasma display panel according to the second embodiment of the present invention.

FIG. 10 is a diagram illustrating a manufacturing process of a scanning electrode and a common electrode of the plasma display panel according to the second embodiment of the present invention.

FIG. 11 is a perspective view of a conventional plasma display panel.

FIG. 12 is a sectional view taken along the line EE in FIG. 11;

13 is a sectional view taken along the line FF in FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front substrate 2a, 2b Metal electrode 3 Insulating protrusion 4a, 4b, 19a, 19b Transparent electrode 5, 15, 20, 22 Scanning electrode 6, 16, 21, 23 Common electrode 7a, 7b Dielectric layer 8 Protective layer 9 Discharge Space 10 Back substrate 11 Data electrode 12 Partition wall 13R, 13G, 13B Phosphor 14 Unit cell (discharge cell) 17a, 17b Metal protrusion 18 Recess

Claims (6)

[Claims] 1. A front substrate provided with a scanning electrode and a common electrode and a rear substrate provided with a data electrode are opposed to each other and sealed, and a plurality of substrates arranged in a matrix in the sealed gap. The plasma display panel having the discharge cell formed therein, further comprising a projection for projecting a scan electrode and a common electrode provided on the front substrate into the discharge cell. 2. A front substrate provided with a scanning electrode and a common electrode and a rear substrate provided with a data electrode are disposed so as to face each other and sealed, and a plurality of substrates arranged in a matrix in the sealed gap are provided. In the plasma display panel in which the discharge cells are formed, a protruding portion for protruding the scan electrode and the common electrode provided on the front substrate into the discharge cell is provided, and the scan electrode and the common electrode are provided on the protruding portion. Plasma display panel characterized by extending the above. 3. The plasma display panel according to claim 1, wherein the protrusion is formed of an insulating material. 4. The plasma display panel according to claim 1, wherein the protrusion is formed of a metal material. 5. The plasma display panel according to claim 1, wherein the protrusion protrudes into the discharge cell along the data electrode. 6. The plasma display panel according to claim 1, wherein the partition formed on the rear substrate is formed to be higher in proportion to the height of the protrusion.