JPH07320646A - Substrate for discharge display apparatus - Google Patents

Abstract

PURPOSE:To easily form an electrode and a diaphragm of a highly precise plasma display panel, that is PDP, and make the panel light. CONSTITUTION:Instead of back face glass of a PDP, a thin plate 1 of an insulator having a large number of through holes 2 arranged in an XY-matrix is used. Electrodes 3, 4 are formed by forming grooves in both sides of a through hole and burying the grooves with a metal paste. Regarding the structures of the grooves, one groove includes a part of the open part of a through hole 2 and the other groove includes the front face of the open part of the through hole, so that the former groove can compose an electrode along the edge of the through hole 2 without choking the through hole 2 and the latter can compose an electrode while sealing one open part of the through hole airtightly. After that, utilizing the airtightness of the substrate, the substrate is sealed directly with frit together with a front face glass to compose an external casing of the PDP.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display discharge tube substrate and a vacuum container.

[0002]

2. Description of the Related Art A conventional display discharge tube, a so-called PDP,
Using two glass plates as substrates, X electrodes, Y electrodes, partition walls, etc. are formed, and discharge display is performed by a matrix between the XY electrodes. Further, as the discharge tube, the above two sheets of glass were adhered with frit glass and evacuated, and the gas required for discharge was sealed inside.

[0003]

According to the above prior art, there are some problems to be solved. In the conventional case, the weight is not a big problem when the screen is small, for example, 20 inches or less, but when the screen is large, for example, 30 inches or more, the thickness of the glass becomes thicker in the process and the weight is practically used. It was a big problem. Also,
As the screen becomes larger, high resolution is often required. In that case, it was practically difficult to form the XY matrix electrodes formed on the glass by aligning the partition walls and other members with high density due to the limitation of the thick film screen printing technique. In view of these conventional problems, the present invention proposes the following new PDP substrate.

[0004]

In the present invention, a substrate for forming XY electrodes is formed of a thin insulating substrate having through holes, and both XY electrodes are formed on both surfaces through the through holes. Then, one electrode is formed so as to hermetically close the through hole, and a part of the electrode enters the inside of the hole and is removed at one end of the hole. Further, one of the electrodes facing each other is formed so that the through hole is not blocked by the other surface, and the side surface thereof faces the previous facing electrode through the space of the hole. Further, in order to form the envelope of the discharge tube with this substrate, the hole portion is placed inside and a frit seal is made with the front glass.

[0005]

The operation of the present invention is shown in FIG.
2 will be described. FIG. 1 shows one of the structures of the embodiment, and FIG. 2 shows an example of the structure of a new PDP having the substrate 1 as an envelope. An X electrode 3 extending in the X direction and a Y electrode 4 extending in the Y direction are opposed to both ends of the through hole 2 provided in the substrate 1, respectively. If this electrode group is placed in the gas space required for discharge, discharge is generated in the through hole 2 at the intersection selected by applying a voltage to the X electrode 3 and the Y electrode 4, and an image can be displayed. Further, since the X electrode 3 hermetically closes the through hole 2, the substrate 1 can be used as an envelope of the PDP.

At this time, since the X electrode 3 hermetically closes one end of the opening of the through hole 2, the substrate 2 is used as an envelope.
A PDP as shown in can be configured. That is, a vacuum container is formed by melting and sealing the substrate 2 and the front glass 7 with a glass frit 8, and a discharge gas is sealed inside to form a PDP.

[0007]

FIG. 1 shows an embodiment of the present invention. The substrate 1 may be a thin plate of an insulator, for example, a ceramic or glass plate of about 0.2 mm, but a thin plate of a metal such as an alloy such as iron nickel is chemically etched to form through holes and grooves as shown in FIGS. 4 and 5. After forming, the whole may be covered with a low melting point glass. Examples of the coating method include a method of applying a paste of low-melting glass and firing it, a method of adhering a powder of low-melting glass to the metal plate by a so-called electrodeposition method, and firing.

Through holes and grooves having the shapes shown in FIGS. 3 and 4 are formed in the substrate 1. The pitch of the through holes is, for example, 0.
The pixel shape of a typical PDP for image display is 3 mm and the hole diameter is, for example, about 0.15 mm. These through holes and grooves can be extremely easily and highly accurately formed by a chemical etching method using a normal photographic process. Needless to say, the shape of the through hole may be square or circular. Further, in the drawings of the embodiments, the through-hole 2 has a vase shape in which the diameter is reduced toward the X electrode 3. However, this is because the hole is easily closed by the X electrode 3, and the diameter of the through-hole is small, for example. 0.05
If it is about mm, it can be closed easily, so it is not always necessary to make such a shape.

The Y groove 10 is filled with a metal paste for thick film printing, such as silver or nickel paste, by a method such as screen printing and baked. After firing, striped electrodes, that is, Y electrodes 4, are formed along the edges of the through holes 2 arranged in the Y direction. The metal paste to be embedded in the Y groove 10 has the Y groove 10 applied only to a part of the opening of the hole.
It can be formed in a striped shape without being divided by the through holes 2. Although a slight amount may slacken inside the through-hole 2, the Y-groove 10 does not close the through-hole 2 because it covers only a part of the hole, and the paste viscosity will be described later. There is no short circuit with the cathode 5. The portion of the Y electrode 4 looking into the end face of the through hole 2 functions as the anode 6.

Similarly, a metal paste for thick film printing, such as silver or nickel paste, is embedded in the X-groove 9 by a method such as screen printing, and is baked. After firing, stripe-shaped electrodes, that is, X electrodes 3 are formed so as to close the openings of the through holes 2 arranged in the X direction. Since the X groove 9 extends over the entire opening of the through hole 2, the opening is closed by the paste that is loosened inside the hole. However, due to its viscosity, it does not fill the entire inside of the through hole 2 and does not short-circuit with the anode 6 described above. The portion of the X electrode 3 that has entered the through hole 2 functions as the cathode 5. When the airtightness of the embedded metal paste is not sufficient, the airtightness can be increased by further applying a low-melting point glass paste to the outside thereof and firing it.

FIG. 2 shows the outer shape of a PDP having a structure in which the above substrate is melt-bonded to the front glass 7 by a glass frit 8 to form a vacuum container. The X electrode 3 has its entire striped electrode directly exposed on the back surface, and the Y electrode 4 has its terminal portion exposed to the outside. The space sandwiched by the substrate 1 and the front glass 7 including the through hole 2 is filled with a discharge gas such as neon, argon, xenon, helium, or a mixed gas thereof, at about 1/2 atm.

[0012]

According to the present invention, since the XY electrodes and the partition walls are simultaneously formed by the grooves and the holes formed by the chemical etching by the photographic method, it is possible to form pixels with high precision and accuracy. The groove structure, which is a requirement of the present invention, can form an XY matrix and a substrate that can be used as a vacuum container. As a result, the rear glass substrate in the conventional PDP can be omitted, so that the PDP can be made thin and lightweight.

[0013]

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of a substrate of the present invention.

FIG. 2 Example of PDP using the substrate of the present invention

FIG. 3 is a developed perspective view of the substrate of the present invention with the Y groove side as an upper surface.

FIG. 4 is a developed perspective view of the substrate of the present invention with the X-groove side facing upward.

[0014]

[Explanation of symbols]

 1 Substrate 2 Through Hole 3 X Electrode 4 Y Electrode 5 Cathode 6 Anode 7 Front Glass 8 Glass Frit 9 X Groove 10 Y Groove

Claims (1)

[Claims] A thin plate formed of an insulator having a large number of through holes arranged in an XY matrix, wherein one surface has a groove connecting the through holes in the X direction, and each groove is connected. By embedding the conductive paste for thick film printing in the groove, including the entire surface of the opening of the hole, and then firing the same, each hole was airtightly closed and electrically connected to form an X electrode, which penetrated into the hole. The X electrode portion serves as one electrode of the discharge display tube, and the other surface has a groove connecting the through holes in the Y direction, and includes a part of the opening of each hole connected by the groove. By filling the groove with a conductive paste for thick film printing and firing, the holes are electrically connected to form a Y electrode, and a part of the Y electrode excluding the end face of the hole is the other electrode to the discharge electrode. And the front side glass on the display side with the X electrode side of the above substrate facing outward. A substrate for a discharge display device in which a vacuum container can be formed by adhering to a plate.