JP2000123742A - Color plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a PDP having display brightness (luminance) heightened to a large extent. SOLUTION: A back substrate 70 provided with electrodes 22, barrier ribs 23 and a fluorescent layer 25 on a supporting body 21 is stuck to a front substrate 60 provided with an electrode 29, a dielectric layer 40 and a protection layer 41 on a transparent supporting body 28, to constituted a PDP. Here, auxiliary barrier ribs 24 are formed between the barrier ribs 23 on the supporting body 21 of the back substrate 70, and the fluorescent layer is provided on the surfaces of the barrier ribs 23 and the auxiliary bulkheads 24.

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 (hereinafter, referred to as PDP) capable of color display. In particular, it relates to a PDP having a high display luminance.

[0002]

2. Description of the Related Art FIG. 5 is a partial sectional view of an example of a conventional PDP. In FIG. 5, the PDP is configured by bonding a back substrate (30) and a front substrate (20). The back substrate (30) is provided with electrodes (2), partition walls (3), and phosphor layers (5, 6, 7) on the support (1). The front substrate (20) is provided with an electrode (9), a dielectric layer (10), and a protective layer (11) on a transparent support (8).

As shown in FIG. 5, when a color display is performed on a PDP, phosphor layers corresponding to red, green, and blue are provided in a discharge space. The phosphor is applied to the side surfaces of the partition walls partitioning the discharge space and the bottom surface of the discharge space in order to enhance the above. When the phosphor layer is formed between the partition walls as described above, as a method of increasing the surface area of the phosphor layer for improving the display luminance when displaying an image, a method of reducing the width of the partition wall or a method of increasing the phosphor layer However, the PDP has not been able to obtain a sufficient luminance without significantly increasing the surface area.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a P display having a display luminance (emission luminance) which is greatly increased.
To provide DP.

[0005]

According to the present invention, there is provided a back substrate having an electrode, a partition, and a phosphor layer provided on a support, and an electrode, a dielectric layer, and a protective layer provided on a transparent support. In a color plasma display panel formed by laminating a front substrate, a back substrate is provided with an auxiliary partition between partitions on its support, and a phosphor layer is provided on the surfaces of the partition and the auxiliary partition. It is a color plasma display panel characterized by.

Further, the present invention is the color plasma display panel according to the above invention, wherein the auxiliary partition wall is in contact with or not in contact with the surface of the front substrate. Further, the present invention is the color plasma display panel according to the above invention, wherein the width of the auxiliary partition is smaller than the width of the partition.

Further, the present invention is the color plasma display panel according to the above invention, wherein the partition is constituted by a first partition on a back substrate and a second partition on a front substrate. .
Further, the present invention is the color plasma display panel according to the above invention, wherein the first partition and the second partition are in a lattice shape.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on one embodiment. FIG. 1 is a partial sectional view illustrating an embodiment of a PDP according to the present invention. As shown in FIG. 1, a PDP according to the present invention includes a rear substrate (70) and a front substrate (60).
Are bonded together. The back substrate (70) has electrodes (22), partition walls (23) on its support (21),
The auxiliary partition (24) between the partitions, the phosphor layer (25, 26, 2)
7) is provided. In addition, the front substrate (6
No. 0) is provided with an electrode (29), a dielectric layer (40), and a protective layer (41) on the transparent support (28).

As the support constituting the back substrate of the PDP in the present invention, soda lime glass can be used, and its thickness is preferably 1 to 5 mm. Further, silver or nickel can be used as an electrode constituting the rear substrate. In addition, a mixture of a low-melting glass and an inorganic pigment can be used for the partition wall that forms the rear substrate. Further, the same material as the partition can be used for the auxiliary partition. In addition, a red phosphor, a green phosphor, and a blue phosphor can be used as the phosphor layers on the side surfaces of the partition walls in the discharge space, the side surfaces of the auxiliary partition walls, and the bottom surface of the discharge space.

As the transparent support constituting the front substrate of the PDP in the present invention, soda lime glass can be used. Further, as an electrode constituting the front substrate, a combination of ITO and silver or a Cr / Cu / Cr film can be used. Further, it is desirable that a low-melting glass can be used as the dielectric layer constituting the front substrate, and that the dielectric layer has high light transmittance and high withstand voltage. Furthermore, as the protective layer constituting the front substrate, MgO having high secondary electron emission and high sputter resistance can be used.

The surface area of the phosphor layer is a factor that greatly affects the display luminance (luminance) when displaying an image on a PDP, and the display luminance (luminance) is proportional to the phosphor application area. That is, it is determined by the height of the partition and the width of the bottom surface of the discharge space.

For example, in the case of an example in the conventional method shown in FIG. 5, in FIG. 5, the surface area S of the phosphor layer formed on the back substrate is such that the height of the partition is H, the width of the bottom of the discharge space is W,
When the length corresponding to one pixel is represented as L (not shown, a direction perpendicular to the same horizontal plane as P), S = (W + 2H) × L.

On the other hand, in the embodiment of the present invention, as shown in FIG. 1, auxiliary partition walls are provided between the partition walls, and when the phosphor layers are formed on the side surfaces and the top portions, the phosphor layer surface area S 'is reduced. S ′ = (W + 2H + 2h) × L.

Therefore, the increase amount ΔS of the phosphor layer surface area in the present invention is as follows: ΔS = S′−S = 2h × L

Specifically, in the example of the conventional method shown in FIG. 5, the cell pitch (P) of the pixel is 420 μm, the length (L) (not shown) is 1260 μm, and the width (w) of the partition is 10 μm.
When the height (H) of the partition is 0 μm and the height (H) of the partition is 150 μm, the phosphor application area is 781200 μm ² per pixel.
On the other hand, in the PDP according to the present invention, as shown in FIG.
In the case of a size of 0 μm, the phosphor application area is 103320
0 μm ² , which is about 1.3 times the display luminance (light emission luminance).

As described above, by providing the auxiliary partition, the application area of the phosphor layer is enlarged and the display luminance (light emission luminance) is increased.
Is to increase. Further, a plurality of auxiliary partition walls can be provided as long as the discharge space is not completely filled with the phosphor layer.

FIG. 2 is a partial sectional view showing an example of the PDP according to claim 4. In FIG. 2, the front substrate (60 ') has electrodes (2) on its transparent support (28).
9), a second partition (33) is provided at a position facing the first partition (53) constituting the dielectric layer (40), the protective layer (41), and the rear substrate (70). is there. In such a PDP, a phosphor layer can also be formed on the side surface of the second partition wall (33).

FIG. 3 is a partial sectional view showing an example of the PDP according to the fifth aspect. In FIG. 3, the front substrate (60 '') has electrodes (2) on its transparent support (28).
9), a grid-like second partition (43) is provided at a position corresponding to the dielectric layer (40), the protective layer (41), and the first partition (53) constituting the rear substrate (70). Is what it is. In such a PDP, a phosphor layer can also be formed on the side surfaces of the grid-like second partition (43). FIG. 4 is a perspective view from below of the front substrate (60 '') in FIG.

[0019]

<Example 1> Soda-lime glass having a thickness of 3 mm was used as a support. An electrode paste (NP-4028, manufactured by Noritake Co., Ltd.) on the support
Was printed by a screen printing method and baked at 580 ° C. for 10 minutes to form electrodes at a pitch of 420 μm.

A low-melting glass paste (NP-7850, manufactured by Noritake Co., Ltd.) is printed thereon by screen printing, and baked at 580 ° C. for 30 minutes to form partitions having a width of 100 μm and a height of 150 μm between the electrodes. Then, an auxiliary partition having a width of 50 μm and a height of 100 μm was formed on the electrode.

Further, a phosphor paste is applied between the partition walls by a screen printing method, and baked at 580 ° C. for 30 minutes, so that a thickness of 1 μm is formed on the bottom surface of the discharge space, the partition walls, and the side surfaces of the auxiliary partition walls.
A red phosphor layer of 0 μm was formed. A green phosphor layer and a blue phosphor layer were formed in the same manner as the red phosphor layer, and used as a back substrate.

Subsequently, soda lime glass having a thickness of 3 mm was used as a transparent support. An ITO electrode paste (manufactured by Noritake Company Limited: NP-
9261) and a low melting glass paste (NP-7970, manufactured by Noritake Co., Ltd.)
To form a dielectric layer, and further formed a protective layer by sputtering using MgO to obtain a front substrate.

The back substrate and the front substrate were bonded with high positional accuracy, sealed with a sealing glass, and filled with a discharge gas into a discharge space. PD manufactured in this way
As for P, a display luminance (emission luminance) about 1.3 times as high as that of the PDP according to the conventional method was obtained.

Example 2 Soda-lime glass having a thickness of 3 mm was used as a support. An electrode paste (Noritake Co., Ltd .: NP-402) on the support
8) was printed by a screen printing method and baked at 580 ° C. for 10 minutes to form electrodes at a pitch of 420 μm.

A low-melting glass paste (PLS3550, manufactured by Nippon Electric Glass Co., Ltd.) is applied over the entire surface by screen printing to form a dry film resist (manufactured by Tokyo Ohkasha:
BF603) was laminated, exposed, and developed to form a sandblast-resistant mask. Width 1 by sandblasting
A partition having a height of 00 μm and a height of 150 μm was formed between the electrodes, and a width of 5 μm was formed.
Two auxiliary partition walls having a height of 0 μm and a height of 150 μm were formed in the discharge space.

Further, a phosphor paste is applied between the partition walls by a screen printing method, and baked at 580 ° C. for 30 minutes to form 10 μm on the bottom surface of the discharge space, the partition walls, and the side surfaces of the auxiliary partition walls.
m red phosphor layer was formed. Similarly to the red phosphor layer, a green phosphor layer and a blue phosphor layer were also formed and used as a back substrate.

Subsequently, soda-lime glass having a thickness of 3 mm was used as a transparent support. An ITO electrode paste (manufactured by Noritake Company Limited: NP-
9261) and a low melting glass paste (NP-7970, manufactured by Noritake Co., Ltd.)
To form a dielectric layer, further use MgO to form a protective layer by a sputtering method, and apply a low-melting glass paste (PLS3550, manufactured by Nippon Electric Glass Co., Ltd.) to the entire surface by a screen printing method. Formed and laminated with a dry film resist (manufactured by Tokyo Ohkasha: BF603),
Exposure and development were performed to form a mask for anti-sandblasting, and a partition having a width of 100 μm and a height of 50 μm was formed by sandblasting to obtain a front substrate.

The back substrate and the front substrate were bonded with good positional accuracy, sealed with sealing glass, and filled with a discharge gas into a discharge space. PD manufactured in this way
As for P, display luminance (emission luminance) about twice as high as that of the PDP in the conventional method was obtained.

[0029]

According to the present invention, there are provided a back substrate having electrodes, partitions and phosphor layers provided on a support, and a front substrate having electrodes, dielectric layers and protective layers provided on a transparent support. In a color plasma display panel formed by laminating, a back substrate is provided with an auxiliary partition between partitions on its support, and a phosphor layer is provided on the surface of the partition and the auxiliary partition, so that display brightness (light emission) is obtained. Brightness) P
DP. Further, according to the present invention, since the partition is constituted by the first partition on the back substrate and the second partition on the front substrate, the PDP has a greatly increased display luminance (emission luminance).

[Brief description of the drawings]

FIG. 1 is a partial sectional view of one embodiment of a PDP of the present invention.

FIG. 2 is a partial cross-sectional view of another example of the PDP of the present invention.

FIG. 3 is a partial sectional view of another example of the PDP of the present invention.

FIG. 4 is a perspective view from below of a front substrate constituting the PDP of the present invention.

FIG. 5 is a partial cross-sectional view showing an example of a PDP in a conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 21 ... Support 2, 22 ... Electrode 3, 23 ... Partition 5, 25 ... Red phosphor layer 6, 26 ... Green phosphor layer 7, 27 ... Blue phosphor layer 8, 28 ... Transparent support 9, 29 ... Electrode 10,40 ... Dielectric layer 11,41 ... Protective layer 20 ... Front substrate 24 ... Auxiliary partition wall 30 ... Back substrate 33,43 ... Second partition wall 53 ... First partition wall 60,60 ', 60' '... The present invention Front substrate 70 ... Back substrate of the present invention

Claims (5)

[Claims] A back substrate provided with an electrode, a partition, and a phosphor layer on a support; an electrode, a dielectric layer on a transparent support;
In a color plasma display panel formed by laminating a front substrate provided with a protective layer, an auxiliary partition is provided between partitions on the back substrate of the back substrate, and a phosphor layer is provided on the surface of the partition and the auxiliary partition. A color plasma display panel, which is provided. 2. The color plasma display panel according to claim 1, wherein said auxiliary partition contacts or does not contact the surface of said front substrate. 3. The color plasma display panel according to claim 1, wherein the width of the auxiliary partition is smaller than the width of the partition. 4. The color plasma display according to claim 1, wherein said partition comprises a first partition on a rear substrate and a second partition on a front substrate. panel. 5. The color plasma display panel according to claim 4, wherein said first partition and said second partition are in a lattice shape.