JPS61109242A - Manufacture of gas discharge display device - Google Patents

Abstract

PURPOSE:To form a highly reliable gas discharge device easily, by winding conductive wire on the backside plate by which electrodes and leading wires are formed, and inserting to connect a driving circuit plate between the backside plate and the leading wires. CONSTITUTION:Inside the backside plate 2, longitudinally on the surface to be opposite to the frontside plate 3, a mixture of a low melting point glass powder and a ceramic powder is printed linearly and baked up to form numerous parallel lines to make up barriers 13, and a number of side grooves 15, rectangular to the direction of the barriers 13, are formed over the barriers 14. On the outer side edges of the plate 2, the same material as the barriers 13 is printed and baked up longitudinally and laterally to make up fixing members 16 and 17 with a difference in level, and anode leads and cathode leads 9 and 10 are crossed on the fixing members in a two level crossing. Then, on the plate 2, is wound conductive wires longitudinally and laterally, the wires placed in the longitudinal grooves 14 and in the lateral grooves 15 inside the plate 2 are used as anodes 7 and cathodes 8 respectively, and leads 9 and 10 are arranged outside the airtight container 5. Moreover, discharge cells are formed at the crossing points of the electrodes 7 and 8.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method of manufacturing a gas discharge display device that utilizes light emission due to plasma discharge generated between electrodes and is used to display characters, symbols, figures, etc. In particular, the present invention relates to a method of manufacturing a gas discharge display device in which the formation of electrodes and lead wires is simple and the connection work of a drive circuit board is easy.

[Conventional technology]

Conventionally, a drive circuit has been developed in which a large number of anode electrodes and cathode electrodes are arranged in parallel and intersected, and discharge cells formed at the intersections of both electrodes are arranged in a matrix, and connected to both of the electrodes. When manufacturing a gas discharge display device that displays images such as characters, symbols, or figures by selectively discharging and emitting light from the discharge cells in response to signals from a It is common to use technology.

That is, when manufacturing a gas discharge display device equipped with electrodes using printing technology, as shown in FIG. The cathode electrode 8 is formed by printing and firing, and also by printing a large number of parallel linear lines of a transparent conductive material on the front substrate 3 made of a transparent insulator such as glass and firing. An anode electrode 7 is formed. Next, the back substrate 2 and the front substrate 3 are formed.
The anode electrode 7 and the cathode electrode 8 are arranged perpendicularly to each other with their electrode forming surfaces facing each other through a spacer 22 having a matrix of through holes 22a provided for discharge. and 3 are hermetically sealed to form an airtight container 5. Furthermore, a gas discharge display panel 6 is formed by sealing a discharge gas mainly composed of a rare gas inside the airtight container 5. In this case, the back substrate 2 and the front substrate 3 are slightly shifted and sealed, and the electrodes on the substrates arranged outside the airtight container 5 connect to the connection portions 23 with lead wires (not shown).
The lead wires led out from the connecting portion 23 are connected to a drive circuit board (not shown) to constitute a gas discharge display device.

On the other hand, when manufacturing a gas discharge display device equipped with electrodes using etching technology, as shown in FIG.
By etching a metal plate made of 6 alloy (alloy of iron, nickel, chromium) or iron-nickel alloy, a large number of parallel plate conductors are formed in a straight line with a pitch of about 0.1 to 0.3n. do. Next, the above-mentioned conductor is arranged at the bottom of a large number of straight vertical grooves 14 bored in parallel in one surface of the back substrate 2 made of an insulating material such as glass or ceramic to form the anode electrode 7, and also serves as an anode electrode 7. A large number of through-holes 8a are bored therein, and a cathode electrode 8 is formed on the first barrier 13 formed between the longitudinal grooves 14, so as to be perpendicular to the anode electrode 7. Thereafter, a front substrate 3 made of a transparent insulator such as glass and having a second barrier 21 corresponding to the first barrier 13 is placed opposite the back substrate 2, and both electrodes 7 and 8 are placed on the front substrate 3. The peripheral edges of the side substrates 2 and 3 are hermetically sealed with a sealing member 4 to form an airtight container 5. Further, a discharge gas is sealed inside the airtight container 5 to form a gas discharge display panel 6. In this case, the conductors arranged in the vertical direction 114 of the rear substrate 2 and on the first barrier 13 extend to the outside of the airtight container 5, and the portions outside the airtight container 5 are lead wires, that is, the anode leads. A drive circuit board (not shown) is connected to both the leads 9 and 10 to form a gas discharge display device.

[Problem that the invention seeks to solve]

However, in the method of manufacturing a gas discharge display device using the above-mentioned printing technology, although it is easy to form the electrodes themselves,
It is necessary to lead out the lead wires for connection to the drive circuit, and the connection between the electrodes and the lead wires is usually done by soldering, which is a complicated process. Because the phenomenon of peeling is likely to occur,
Its reliability is low.

On the other hand, in the method of manufacturing a gas discharge display device using etching technology, the electrodes and lead wires are formed integrally, so there is no need to derive the lead wires separately (and the lead wires are durable). Since the electrodes are arranged in an orderly manner, it has the advantage of making it easy to connect the drive circuit board, but on the other hand, the pitch of the electrodes is narrow at about 0.1 to 0.3fl, making it difficult to manufacture them with high precision. The production cost is high.

The present invention was devised in view of the above-mentioned points, and it is easy to form electrodes, and there is no need to derive separate lead wires.
Moreover, it is an object of the present invention to provide a method for manufacturing a gas discharge display device, which allows the connection of a drive circuit board to be simple, facilitates manufacturing work, is inexpensive, and provides a highly reliable device.

[Means and actions for solving the problem] The above objectives are:
This is accomplished by winding a wire-shaped conductor around a board, forming electrodes and lead wires using this conductor, and inserting and connecting a drive circuit board between the board and lead wires. The method for manufacturing a gas discharge display device of the invention includes winding wire-like conductors around a rear substrate in parallel with a predetermined pinch, then placing a front substrate to face the rear substrate, and winding the peripheral edge of the double-sided substrate. The conductor is hermetically sealed to form an airtight container, the portions of the conductor disposed inside and outside the airtight container serve as electrodes and lead wires, respectively, and a drive circuit is then installed between the rear substrate and the lead wires. The present invention is characterized in that the mounted board is inserted, the lead wires and the drive circuit are connected, and then unnecessary portions of the lead wires are cut off. In the method for manufacturing the gas discharge display device, the electrodes can be formed by a simple operation of winding the conductor around the back substrate, and the electrodes and the lead wires are integrally formed. Furthermore, when connecting to the drive circuit board, the drive circuit board can be inserted between the rear board and the lead wires, making it easy to hold the drive circuit board and align the drive circuit board with the lead wires.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a partially cutaway schematic perspective view of a gas discharge display panel constituting a gas discharge display device produced by a manufacturing method according to an embodiment of the present invention, FIG. 2 is a view of FIG. 1 viewed from the rear, and FIG. The figure is a schematic perspective view showing a state in which a drive circuit board is being connected to a gas discharge display panel. In the figure, a gas discharge display device 1 is constructed by winding wire-shaped conductors in parallel with a predetermined pinch in the vertical and horizontal directions of a rear substrate 2 made of an insulating material such as glass or ceramic. A front substrate 3 made of a translucent insulator such as glass is placed opposite the back substrate 2 at a predetermined distance, and the peripheral edges of the side substrates 2 and 3 are hermetically sealed with a sealing member 4 such as frit glass. to form an airtight container 5 as an envelope, and the airtight container 5
A gas discharge display panel 6 is formed by filling a discharge gas mainly composed of a rare gas such as neon, xenon, or argon.

Further, the portions of the wire-shaped conductor arranged inside and outside the airtight container 5 constitute electrodes (anode electrode 7, cathode electrode 8) and lead wires (anode lead 9, cathode lead 10), respectively, and the anode lead 9 An anode drive circuit board 11 and a cathode drive circuit board 12 are connected to the cathode leads 10 and 10, respectively.

However, in manufacturing the gas discharge display device according to the present invention, first, a large number of mixtures of low melting point glass powder and ceramic powder are placed in parallel in the vertical direction of the inner surface of the rear substrate 2, that is, the surface scheduled to face the front substrate 3. The first barriers 13 are provided in a protruding manner by printing and firing in a straight line, and vertical grooves 14 are formed between the first barriers 13 and arranged at a pitch of 0.3R. A large number of horizontal grooves 15 perpendicular to the extending direction of the barrier 13 are formed in parallel on the upper surface of the barrier 13 with the same <0.3u pinch. In this case, the first barrier 13 and the lateral groove 15 have a predetermined thickness by overlapping thick film printing, and in this example, the thickness up to the top surface of the first barrier 13 is 0.
．． 17 v+, the thickness to the bottom of the horizontal groove 15 is 0.15
M). Further, the same material as the first barrier 13 is linearly printed and fired on the outer peripheral edge of the rear substrate 2 in the horizontal and vertical directions of the rear substrate 2, respectively, to form the first fixing portion 16 and the first barrier 13. A second fixing part 17 is provided protrudingly.

Both fixing parts 16 and 17 are formed as protrusions having a substantially semicircular cross section, and the height of the first fixing part 16 is set between the rear substrate 2 and the anode lead 9 by the anode drive circuit board 11. The height should be selected to be sufficient for insertion, and the second
When a wire-shaped conductor is wound around the rear substrate 2 with a height difference lower than the height of the fixing portion 17 of It is made to do so. The melting point of the low-melting glass contained in the material constituting both the fixing parts 16 and 17 is selected to be approximately the same as the melting point of the sealing member 4 that seals the rear substrate 2 and the front substrate 3. There is.

Next, 42-6 alloy or iron with a diameter of about 0.1 to 0.21 m is applied to the rear substrate 2 in the vertical and horizontal directions, respectively.
A wire-shaped conductor made of a nickel alloy is wound around a vertical groove 14 or a horizontal groove 1 formed on the inner surface of the back substrate 2 of the conductor.
The portions arranged in one of the grooves (vertical groove 14 in this example) and the other groove (horizontal groove 15 in this example) of 5 constitute an anode electrode 7 and a cathode electrode 8, respectively, and also serve as the back substrate of the conductor. The parts arranged on the outer surface of 2, that is, the surface that is the outside of the airtight container 5, are formed into lead wires, that is, an anode lead 9 that is continuous with the anode electrode 7 and a cathode lead 10 that is continuous with the cathode electrode 8. Furthermore, a discharge cell 18 is formed at the intersection of the anode electrode 7 and cathode electrode 8.

Thereafter, a sealing member 4 is placed between the rear substrate 2 and the front substrate 3 at the periphery between the side substrates, and the sealing member 4 is heated at a temperature sufficient to melt the sealing member 4, and at the same time, the back substrate 2 and the front substrate 3 are evacuated and After filling the discharge gas, the airtight container 5 is sealed to form a gas discharge display panel 6.

In this case, the first fixing part 16 and the second fixing part 17 formed on the outer surface of the rear substrate 3 are connected to the sealing member 4 as described above.
Since the anode lead 9 and the cathode lead 10 have substantially the same melting point as the first fixing part 1,
6 and the second fixing part 17 by biting into the surfaces thereof,
Both lead wires 9 and 10 are arranged in an orderly manner, and their pitches are also maintained at predetermined values.

However, in order to connect the gas discharge display panel 6 to the drive circuit board, first, as shown in FIG.
Among them, the cathode lead 10 arranged on the outside is fixed with adhesive tape 19 before and after the part where it is planned to be connected to the drive circuit board, and cut from the middle, and then the part arranged on the second fixing part 17 is cut. Fold it up and set it upright. In this case, since the cathode lead 10 is fixed with the adhesive chip 119, there is no possibility that the pitch of the cathode lead 10 at the intended connection portion will be disturbed, and the connection work with the drive circuit board can be easily performed. Further, since the anode lead 9 and the cathode 10 intersect three-dimensionally, there is no risk of accidentally cutting the anode lead 9 when cutting the cathode lead 10 described above. Next, the anode drive circuit board 11 equipped with an anode drive circuit is inserted between the anode lead 12 and the rear substrate 2, and the connection terminals provided at both ends of the board 11 are aligned with the anode lead 9. Also, connect by welding, soldering, etc. After that, the unnecessary part of the anode lead 9,
That is, the area between the connecting portions 9a between the connecting terminal portions at both ends of the anode drive circuit board 11 is cut off. Thereafter, the cathode drive circuit board 12 is placed on the anode drive circuit board 11 with a distance maintained using a spacer 20 or the like, and the connection terminals provided at both ends of the board 12 and the cathode leads 10 are connected. are aligned and connected, and then the unnecessary part of the cathode lead 10, that is, the connection part 1 with the connection terminal part
Cut out the part protruding from 0a. In the above embodiment, the case where the drive circuit board on which the drive circuit is mounted is composed of two boards, the anode drive circuit board 11 and the cathode drive circuit board 12, has been described. It is also possible to mount the cathode drive circuit and the cathode drive circuit together on one drive circuit board. In this case, after fixing the cathode lead 10 with adhesive tape 19 and cutting it, the anode lead 9 and cathode lead 9 are mounted on the drive circuit board. lead 1
0 and then cut out unnecessary parts of the rear leads 9 and 10.

As shown in FIG. 4, the front substrate 3 constituting the airtight container 5 has a linear second barrier 21 corresponding to the first barrier 13 on its inner surface, that is, the surface facing the rear substrate 2. A large number of them are jutted out in parallel. Like the first barrier 6, the second barrier 21 is formed by applying a mixture of low melting point glass powder and ceramic powder using printing technology, and is similar to the first barrier 6. The melting point of the low melting point glass contained in the material constituting 21 is selected to be approximately the same as the melting point of the sealing member 4 used to seal the rear substrate 2 and the front substrate 3. Therefore, when the back substrate 2 and the front substrate 3 are sealed, if the side substrates 2 and 3 are pressurized and heated, the cathode electrode 8 bites into the first barrier 13 and the second barrier 21, and the Both the barriers 13 and the two walls are fused and integrated, leaving a slight gap 15a at both ends of the lateral groove 15. Therefore, since the discharge cells 18 adjacent to each other along the cathode electrode 8 are substantially cut off, the expansion of the negative glow that tends to spread along the cathode electrode 8 during discharge is prevented, and the adjacent discharge cells 18 It is possible to prevent the so-called crosstalk phenomenon that causes erroneous discharge. Even in this case, there is a slight gap 15a between adjacent discharge cells 18.
Since they are in communication with each other, appropriate ion diffusion occurs, and there is no risk of delay in starting discharge.

Further, the width of the second barrier 21 is formed narrower than the width of the first barrier 13, so that the exposed area of the cathode electrode 8 on the front substrate 3 side in the discharge cell 18 is reduced on the rear substrate 2 side. is larger than the exposed area of the cathode electrode 8 and the space created between the cathode electrode 8 and the front substrate 3 is wide, so that the negative glow is focused toward the front substrate 3 side of the cathode electrode 8 and the space is The discharge light expands inwards, producing discharge light with high luminance and improving display performance.

In the above embodiment, a method for manufacturing a dot matrix type gas discharge display device was described in which wire-like conductors were wound in the vertical and horizontal directions of the rear substrate. A bar graph type gas discharge display in which electrodes and lead wires are formed by winding a wire-like conductor only on either side in the horizontal direction (the counter electrode is formed by coating a translucent conductive material on the front substrate). It can also be applied to the manufacture of devices.

〔Effect of the invention〕

As described in detail above, the method for manufacturing a gas discharge display device of the present invention involves winding a wire-shaped conductor around the back substrate that constitutes a part of the envelope, and forming electrodes and lead wires using the conductor. Since the electrodes and lead wires are integrally formed of the same conductor, there is no need to lead out separate lead wires. Since the connection is made by inserting a circuit board, the connection work is simple, the manufacturing work is easy, and a gas discharge display device that can be provided at a low cost and has high reliability can be obtained. .

[Brief explanation of the drawing]

Claims (1)

[Claims] (1) After winding wire-shaped conductors in parallel at a predetermined pitch around the back substrate, place the front substrate to face the back substrate, and hermetically seal the peripheries of both substrates to form an airtight container. Further, the portions of the conductor arranged inside and outside the airtight container constitute electrodes and lead wires, respectively, and then a board carrying a drive circuit is inserted between the back board and the lead wires. A method for manufacturing a gas discharge display device, comprising connecting lead wires and a drive circuit, and then cutting off unnecessary portions of the lead wires.