JPH02244540A - Manufacture of flat display panel - Google Patents

Abstract

PURPOSE:To manufacture a display panel in the form of flat plate, which is free from residual strain and equipped with uniform gap between two base boards mating with each other, by blocking the gaps for display medium encapsulation space, which open at peripheral edges of the two base board, with seal glass before baking process. CONSTITUTION:After one base board 1 is put over another base board 11 in such a way as oppositely with a spacer 5 interposed between, low melting point glass for sealing 21 is applied so that it blocks the display medium incapsulation gaps, which open at the peripheral edges of the two base boards, and heated and melted to seal the peripheral edges in the condition that no load is being applied. This eliminate generation of residual strains in load applied parts of the glass base boards after sealing to cause increase in the panel strength. Further the gap between base boards can be made uniform.

Description

[Detailed Description of the Invention] [Summary] Regarding the manufacturing method of a flat display panel such as a plasma display panel, an improvement has been made in which the periphery of a pair of glass substrates facing each other with a spacer interposed therebetween is sealed in a no-load state. and there is no residual distortion.
Furthermore, in order to achieve a uniform gap between the substrates, a pair of substrates each having a plurality of electrodes supported on the surface of at least one substrate are arranged facing each other with a display medium enclosure space between them.
In the method for manufacturing a display panel in which the periphery thereof is sealed with a sealing glass material, after arranging one of the pair of substrates to face the other substrate with a spacer interposed therebetween, A gap for the display medium enclosure space opened at the peripheral edges of both substrates is closed with a sealing glass material before firing, and the display medium enclosure space is sealed by firing the glass material into individual pieces. Configure.

[Industrial application field]

The present invention relates to a method for manufacturing a flat display panel, and more particularly to an improvement in the sealing process of a flat display panel such as a plasma display panel.

-a Flat display panels consisting of plasma display panels include matrix types with dot display format, numeric display panels with special electrode patterns, and surface discharge panels with an electrode pattern on only one substrate. Various types of display panels have been proposed.

The discharge characteristics of these panels greatly depend on the gap length of the discharge space of the panel, so it is necessary to maintain these gap lengths uniformly over the entire surface, and in order to seal the discharge gas inside the panel, it is necessary to maintain the gap length uniformly over the entire surface. What is needed is a method for easily creating a vacuum seal between substrates.

[Prior Art] The sealing process in manufacturing a flat display panel made of a conventional plasma display panel is shown in FIG. 4(a).
For example, in the case of an AC drive type, as shown in the main part sectional view of and 11, low melting point glass layers 4 and 1 for panel sealing with the same pattern as the area
4 by a screen printing method or the like, these low melting point glass layers 4 and 14 are pre-fired.

Thereafter, the pair of glass substrates 1 and 11 are separated by a plurality of spacers 5 that define a gas discharge space, that is, a discharge gap.
The plurality of X electrodes 2 and X electrodes 12 are arranged to face each other in such a manner that they are orthogonal to each other and their low melting point glass layers 4 and 14 are in contact with each other. By heating and melting the low melting point glass layers 4 and 14, the space between the pair of glass substrates 1 and 11 is sealed, as shown in the plan view of FIG. The assembly of the desired display panel is completed.

[Problem to be solved by the invention]

By the way, in the conventional sealing method as described above, a load is applied to a pair of glass substrates 1 and 11 which are arranged facing each other with a low melting point glass layer 414 provided thicker than the spacer 5 interposed therebetween. The layer 414 is heated and melted to seal the other glass substrate 1 in contact with a plurality of spacers 5 arranged on one glass substrate 11, . Since it tends to become unstable when the substrate 1 presses the low-melting glass layer 4.14 in a heated and molten state to ensure that it comes into contact with all the spacers 5, there is a problem that the discharge gap becomes non-uniform. Further, after the load sealing, residual strain occurs at the load application portion of the opposing glass substrate 111, which has the disadvantage of causing panel cracks due to impact □, etc.

Furthermore, since a relatively large area is occupied by the sealed portion made of low melting point glass, the effective discharge display area tends to decrease.

In view of the above-mentioned conventional problems, the present invention has been improved by sealing the periphery of a pair of glass substrates facing each other with a spacer interposed therebetween under no load, thereby eliminating residual strain and achieving a uniform gap between the substrates. The object of the present invention is to provide a novel method for manufacturing a flat display panel.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention arranges a pair of substrates each having a plurality of electrodes supported on the surface of at least one substrate facing each other across a display medium enclosure space, and seals the periphery with a sealing glass material. In the method for manufacturing a display panel comprising: placing one of the pair of substrates facing the other substrate with a spacer interposed therebetween, and then opening the display panel at the peripheral edge of both of the facing substrates; The gap for the medium enclosure space is closed with a sealing glass material before firing, and the display medium enclosure space is sealed by firing and thinning the glass material.

[For production]

In the manufacturing method of the present invention, after arranging the other substrate on one substrate with a spacer interposed therebetween, a glass material for soil is placed so as to close the display medium enclosing gap that opens at the peripheral edge of both of the opposing substrates. Since the peripheral edges of both substrates are sealed by heating and melting the glass material without applying a load, there is no residual strain in the load-applied portion of the glass substrate after sealing as in the conventional method. This eliminates this problem, increases the panel strength, and makes it possible to obtain a flat display panel with good discharge characteristics and a uniform gap between substrates.

[Examples] Examples of the present invention will be described in detail below with reference to the drawings.

FIGS. 1(a) to 1(d) are diagrams for sequentially explaining one embodiment in which the manufacturing method of the present invention is applied to manufacturing a plasma display panel, and FIG. 1(a) is a plan view, and FIG. )) ~
(d) is a sectional view of a main part. Further, parts equivalent to those in FIGS. 4 to 6 are given the same reference numerals.

First, as shown in FIGS. 1(a) and Φ), on one glass substrate 11 on which a plurality of X electrodes 12 covered with a dielectric layer 13 are disposed on the inner surface, a dielectric layer is similarly placed on the inner surface. A plurality of X electrodes 2 covered with a body layer 3 are arranged, and the other glass substrate 1 having a smaller surface area than the one glass substrate 11 is They are arranged to face each other orthogonally and with the side end surfaces of the two sides aligned as shown in the figure.

In addition, prior to this, a plurality of spacers 5 are interposed at positions avoiding the electrode intersections of one of the lower glass substrates 11, and are arranged facing each other as shown in the figure, and as shown in FIG. A sealing glass material, for example, a paste-like low melting point glass 21, is applied by hand or by a coating device such as a dispenser between the side end surfaces of the glass substrates 1 and the corresponding edge surfaces of the glass substrates 11. After painting, let it dry.

Instead of this coating step, a low melting point glass material 22 which is prepared by pre-sintering low melting point glass powder into a rod shape is applied to the side end surface of the other glass substrate 1 and the corresponding side end surface as shown in FIG. 1(C). It may be arranged along between the edge surfaces of the glass substrate 11.

Next, by heating and melting the dried low melting point glass 21 or the rod-shaped low melting point glass material 22, the structure shown in FIG.
As shown in d), the space between the side end surface of the other glass substrate 1 and the corresponding edge surface of one glass substrate 11 is made airtight by a low melting point glass 21 or a low melting point glass material 22 that has good wettability when melted. Moreover, a uniform discharge gap is obtained, and since no load is applied, there is no residual strain and the strength of the panel is improved.

In addition, in the above embodiment, one glass substrate 11 and the other glass substrate 1 having a smaller surface area than that glass substrate 11 are used.
are arranged facing each other via a spacer 5, and the side end surface of the other glass substrate l and the corresponding edge surface of one glass substrate 11 are sealed with low melting point glass 21 without applying any load. Although the present invention is not limited to this example, for example, as shown in FIG. A plurality of X electrodes 42 similarly covered with a dielectric layer are disposed on the inner surface of the glass substrate 31, and the other glass substrate 41 is narrower in width than the other glass substrate 31. The plurality of X electrodes 42 and the X electrodes 32 are disposed opposite to each other with a plurality of spacers interposed therebetween so as to be orthogonal to each other, and are shifted in the length direction as shown in the figure, and the edge surface of the one glass substrate 31, Alternatively, the side end face and the corresponding side end face or edge face of the other glass substrate 41 are sealed with the low melting point glass 51 without applying any load.

Alternatively, as shown in FIG. 3, one glass substrate 6 is provided with a plurality of X electrodes 62 covered with a dielectric layer on its inner surface.
1, the other glass substrate 71 on which a plurality of X electrodes 72 similarly covered with a dielectric layer are disposed on the inner surface is arranged to face each other orthogonally with a plurality of spacers interposed therebetween as shown in the figure. The edge end surface or side end surface of one of the glass substrates 61 and the corresponding side end surface of the other glass substrate 71,
Alternatively, a similar effect can be obtained when the edges are sealed with low melting point glass 81 without applying any load.

[Effects of the Invention] As is clear from the above description, according to the method for manufacturing a flat display panel according to the present invention, a pair of substrates each having a plurality of electrodes supported on the surface of the substrate is connected via a spacer. By sealing the peripheries of these substrates with low-melting glass for sealing when they are arranged facing each other, a uniform gap between the substrates can be obtained, and since no load is applied, residual strain will not occur in the glass substrates after sealing. This eliminates the risk of this occurring and increases the panel strength. In addition, because the sealing of the low-melting glass material for sealing is done externally, the sealing area is reduced, and the effective discharge display area is increased even though the panel size is the same as before.
It becomes possible to obtain panels with good display quality at a high yield.

[Brief explanation of drawings]

FIGS. 1(a) to 1(a) are diagrams for sequentially explaining examples in which the manufacturing method of the present invention is applied to manufacturing a plasma display panel, and FIG. 1(a) is a plan view, and FIG. b)～
(d) is a cross-sectional view of main parts, FIG. 2 is a plan view for explaining another embodiment of the manufacturing method according to the present invention, and FIG. 3 is a plan view for explaining still another embodiment of the manufacturing method according to the present invention. 4(a) to 4(C) are diagrams for sequentially explaining an example of a conventional method for manufacturing a flat display panel, and FIGS. 4(a) and 4(C) are cross-sectional views of main parts. Figure (b) is a plan view. In Figures 1(a) to (d) to Figure 3, 1.41.7
1 is the other glass substrate, IL31.61 is one glass substrate, 2.42.72 is the X electrode, 12, 32.62 is the X
Electrode, 3.13 is dielectric layer, 5 is spacer, 21.51
．． Reference numeral 81 indicates a low melting point glass, and 22 indicates a rod-shaped low melting point glass material. Diagram 3 of 2X Electric Brass 5A V-Size 5 (a)

Claims (1)

[Claims] A pair of substrates (1, 11) each having a plurality of electrodes (12) supported on the surface of at least one substrate are arranged facing each other across a display medium enclosure space, and the periphery is surrounded by a sealing glass. Material (21)
In the method of manufacturing a display panel sealed by
After arranging the other substrate (1) to face each other with a spacer (5) interposed therebetween, a gap for a display medium enclosure space opened at the peripheral edges of the two facing substrates (1, 11) is formed before firing. A method for manufacturing a flat display panel, characterized in that the space for enclosing a display medium is sealed by closing with a sealing glass material (21) and firing the glass material (21) into individual pieces.