JP3135938B2 - Method for manufacturing plasma display panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a plasma display panel (PDP), and is characterized by a method for forming a sealing member for sealing the periphery of a pair of substrates.

In a flat display device such as a PDP, it is desired to reduce the difference between the size of the display screen and the external dimensions as much as possible, that is, to reduce the non-display area surrounding the display screen.

[0003]

2. Description of the Related Art FIG. 4 is a plan view showing an outline of a general PDP 10. As shown in FIG.

[0004] The PDP 10 is a glass substrate 1 on the display surface H side.
By disposing the glass substrate 1 and the glass substrate 21 on the back side facing each other and sealing the peripheral portion of the facing region of the glass substrates 11 and 21, a discharge space having a gap of about several tens to hundreds μm was formed inside. Things.

[0005] On the inner surfaces of the glass substrates 11 and 21, electrodes are arranged at a constant pitch (electrodes 22 on the glass substrate 21 are shown in the figure), and these electrodes define discharge cells. Is a display area (display screen) EH.

Normally, the display area EH is provided so as to avoid the vicinity of the sealing area ES where the discharge becomes unstable due to the release of gas from the sealing material 31. That is, in the PDP 10, a portion inside the glass substrate surface with respect to the sealing region ES by the sealing material 31 and the vicinity thereof becomes the display region EH.

[0007] The electrodes are connected to the glass substrate 1 from the discharge space.
The PDP 10 is connected to an external drive circuit via a flexible printed circuit board (not shown) or the like. And to make the connection easier,
The size and facing position of each of the glass substrates 11 and 21 are selected such that both end edges protrude outside the edge of the other glass substrate.

In manufacturing the PDP 10, predetermined components such as electrodes and dielectric layers are separately provided for each of the glass substrates 11 and 21, and then the two glass substrates 11 and 21 are provided.
Prior to the opposing arrangement, a frame made of low-melting glass is provided as a sealing member on both or one of the glass substrates by a thick film method.

That is, a low-melting glass paste for sealing is printed using a screen mask having a frame-shaped pattern, and then baked, so that the gap size of the discharge space as shown in FIG. A frame-shaped glass body (sealing member) 31B having a height H of about 5 to 2 times is provided.

Thereafter, a heat treatment is performed in a state where both glass substrates 11 and 21 are overlapped. Thereby, the frame-shaped glass body 31B becomes a sealing material 31 that fills the gap between the substrates by melting,
The discharge space is sealed in the form of fusion by the sealing material 31.

The size of the discharge space 30 is determined by the display area EH.
In order to make it uniform over the entire area of the glass substrate 11,
At the time of opposing arrangement of 21, a spacer is provided at an appropriate position.

[0012]

Conventionally, when a frame-shaped glass body is provided as a sealing member, first, a glass paste extruded from a screen mask at the time of printing spreads on a glass substrate. Then, even during the subsequent firing, the bottom (foot) of the frame-shaped glass body is expanded by so-called sagging in a molten state. Therefore, as shown in FIG. 5, for example, when the width of the frame-shaped mask pattern is about 3 mm, the width W of the bottom of the frame-shaped glass body 31B expands to about 4 to 5 mm.

For this reason, the width of the sealing region ES at the stage when the sealing of the glass substrates 11 and 21 is completed becomes large, and the size of the glass substrates 11 and 21 is selected in consideration of this. In general, there is a problem that the outer shape of the PDP 10 becomes large.

In order to solve such a problem, it is conceivable to previously set the width of the mask pattern to be small. However, in such a case, unevenness in printing tends to occur, and Since the amount of the glass paste used also becomes small, the sealing may be incomplete.

In view of the above problems, an object of the present invention is to reduce the size of a PDP having a display screen of a predetermined size by reducing the width of a sealing region surrounding the display screen.

[0016]

According to a first aspect of the present invention, there is provided a method for sealing the periphery of a pair of substrates, as shown in FIGS. A sealing member 31 on at least the one substrate 21;
A method for manufacturing the plasma display panel 1 provided with A, wherein a plurality of parallel barriers 40 are formed at an end of the substrate 21, and thereafter the sealing member 31 A is provided between the barriers 40. It is.

In the method according to the second aspect of the present invention, the display area E
H at the same time as the formation of the partition 29 for partitioning H
0 is formed.

[0018]

The sealing member 31A is provided on the substrate 21 by a thick film method for printing and firing a material. At this time, the sealing member 31A is formed by a plurality of barriers 40 formed in advance.
Is prevented from spreading.

[0019]

1 to 3 are cross-sectional views schematically showing a PDP 1 according to the present invention in a manufacturing stage. In these drawings, components other than those particularly relating to the present invention are not shown, and components having the same functions as those in FIG. 4 are denoted by the same reference numerals.

Referring to FIG. 4 as well, first, as shown in FIG. 1, when a partition wall 29 made of low-melting glass is formed in the display region EH on one of the glass substrates 21 by a thick film method, In the region to be sealed along the edge of the glass substrate 21, double frame-shaped barriers 40 parallel to each other are formed corresponding to the outer frame line and the inner frame line, respectively.

The partition 29 is provided to partition the display area EH for each dot of the matrix display. Each barrier 40
Are set to about 3 mm, and the height H1 of each barrier 40 is set to about 20 μm.

The height of the partition wall 29 can be adjusted by appropriately selecting the number of times of printing the glass paste.
Can be higher than zero.

After the barriers 40 and the partition walls 29 are formed in this manner, for example, an electrode (address electrode) for selecting display dots between the partition walls 29 and a display color other than the emission color of gas discharge. A phosphor or the like is provided.

Thereafter, as shown in FIG. 2, a paste of a low-melting glass having a small particle size for sealing is printed and baked, so that the paste is raised in the gorge of the barrier 40 provided earlier, that is, at the top. Is projected from the barrier 40,
A sealing member 31A having a height H2 of about 150 μm is provided.

When the sealing member 31A is provided as described above, the barrier 40 causes the paste-like or molten low-melting glass to flow out of the region to be sealed on the glass substrate 21 during printing and firing of the glass paste. To prevent it from spreading.

That is, the sealing member 3 is formed by the barrier 40.
The size of the formation region of 1A is defined, and its expansion is suppressed. Therefore, it is not necessary to select a large size of the glass substrate 21 in consideration of the expansion of the sealing member 31A as in the related art, and the PDP 1 can be downsized.

Then, as shown in FIG. 3, glass substrates 11 and 12 provided with sealing members 31A of the same shape respectively.
1 are opposed to each other so that the sealing members 31A overlap (FIG. 3A), and heat treatment is applied in that state.

Thus, the two sealing members 31A are integrated by melting to form the sealing material 31, and the glass substrate 1
The periphery of the parts 1 and 21 is sealed [FIG. 3 (b)]. After that, the discharge space 30 is evacuated and filled with a discharge gas via a ventilation path (not shown), and the PDP 1 is completed.

According to the above-described embodiment, the width of the sealing region ES is reduced so that the glass substrates 11 and 12 extend from the outer end of the display region EH.
Since the distance to one edge can be shortened, when a plurality of PDPs 1 are arranged vertically and horizontally adjacently to provide a large screen by a collective screen, the non-display portion between the small screens is made thinner for easy viewing. You can get a big screen.

In the above embodiment, the distance W between the barriers 40
1, the height H1, and the height H2 of the sealing member 31A are PD
It can be appropriately changed according to the size of P1, the gap size of the discharge space 30, and the like.

In the above-described embodiment, two barriers 40 are provided so as to double surround the display area EH. However, three or more barriers 40 may be provided in the area to be sealed.

In the above embodiment, the sealing member 31A is provided on both the glass substrates 11 and 21. However, the present invention is also applicable to the case where the sealing member 31A is provided on only one of the glass substrates. Can be applied.

[0033]

According to the present invention, the width of the sealing region surrounding the display screen can be reduced, and the size of a PDP having a display screen of a predetermined size can be reduced.

According to the second aspect of the present invention, the expansion of the sealing region can be prevented with the same number of manufacturing steps as before.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view schematically showing a state of a PDP according to the present invention at a manufacturing stage.

FIG. 2 is a cross-sectional view schematically showing a state of a PDP according to the present invention at a manufacturing stage.

FIG. 3 is a cross-sectional view schematically showing a state of a PDP according to the present invention at a manufacturing stage.

FIG. 4 is a plan view showing the outer shape of a general PDP.

FIG. 5 is a cross-sectional view schematically showing a state of a PDP manufacturing stage according to a conventional manufacturing method.

[Explanation of symbols]

 Reference Signs List 1 PDP 11 glass substrate (substrate) 21 glass substrate (substrate) 40 barrier 31A sealing member 29 partition

Claims (2)

(57) [Claims] To 1. A for sealing the periphery of the pair of base plates, a plasma display panel manufacturing method of providing at least the sealing member on the one base plate, an end portion of the base plate method for manufacturing a plasma display panel to form a plurality of parallel barriers each other, and wherein subsequently the provision of the sealing member between each barriers to the. 2. A method of manufacturing a plasma display panel of claim 1, wherein the forming a forming simultaneously with the barriers of the septum wall for partitioning the display area.