KR790001725B1 - Method for manufacturing a multi-digit fluorescent indicating apparatus - Google Patents

Abstract

A multi-digit fluorescent indicating appts was fabricated by the following: process an electrode frame making having one of two grid terminal lead-in wires (21) and cathode (23) connected to a holding frame disposed to either grids or spacers coupled with a multi-digital indicating patterns disposed to a base plate(12), a base plate for assembling an electrode a protection cap (34), and a removal of unnecessary parts of the holding frame and the terminal lead-in wires after the protection cap had been fabricatde.

Description

Manufacturing method of multi-stage fluorescent display device

1 (a) section plan view and A-A cut sectional drawing which show one example of the conventional multistage fluorescent display tube of FIG. 1 (a) and (b),

2 to 5 show an embodiment of the multi-stage fluorescent display of the present invention.

2 (a) and 2 (b) show a cutout plan view and a side view of a part of a display device;

3 is a cross-sectional view of a main portion taken along line B-B of FIG. 2A,

(A), (b) and (c) are perspective views of main parts of a spacer frame, a grid frame and a substrate portion,

5 is a one-part cutaway plan view showing another embodiment of the display device of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a flat multi-stage fluorescent display device used in an electronic desk calculator (hereinafter referred to as an electrostatic charge).

There are a variety of conventional multi-stage fluorescent display tubes and multi-stage fluorescent display devices (hereinafter referred to as display devices).

For example, on a substrate made of an insulating material such as ceramics, a pattern display part composed of a group of segmented electrodes coated with phosphors is disposed, and a grid and The cathode is disposed to form a display electrode assembly, and the display electrode assembly is a protective cap such as a cylindrical glass tube, or one of the two substrates is formed in a plate shape with a transparent window, and the other This flat boat is secured in an airtight protective cap by sealing it in an inverted shape and sealingly enclosing a lead-in wire at least at one end thereof. The one which has a structure which arrange | positions the stem part made to make it, and welds and forms it airtight is used.

The conventional structure having such a structure is to form a display electrode assembly having a plurality of pattern display portions and a stem portion through which a plurality of lead wires are enclosed, and to connect them in combination, and then fix them in a protective cap and seal them in an airtight manner. .

Therefore, in the case where the display electrode assembly and the stem portion are connected in combination, many internal connection wirings are congested and become very complicated. Therefore, it is difficult to reduce the size and the number of processes required for the combination connection also increases.

In addition, since there are many places connected by welding or the like, there are problems such as not enough in terms of reliability.

In order to solve the above-mentioned problems, the display device as described in, for example, Japanese Patent Laid-Open No. 48-62378 has been proposed.

As shown in Figs. 1 (a) and (b), the display device comprises the components constituting each of several patterns to be displayed first on the substrate 1 made of an insulating material such as glass or ceramic. Depending on the arrangement of the segment electrode groups 2, conductive coatings such as the electrical connection wiring 3, the lead conductor 4, the terminal 5, and the segment electrodes 2a-2h are provided. ) And an insulating film 6 to insulate these layers are stacked together to form a printed circuit board 1a. A fluorescent substance 7 is applied to each segment electrode 2a-2h to form a pattern display part of an anode. A plurality of grids 8 and a cathode 9 for emitting hot electrons are connected to the connection wiring 3 with a conductive adhesive 10 so as to face each segment electrode group 2. It is fixed to the substrate 1a, and the electrode portions on these substrates are formed of a printed substrate 1a and a top window plate 11 welded thereon. It is installed in a vacuum-tight protective cap.

The terminal 5 on the printed circuit board 1a to be connected to the external circuit is provided in a portion outside the protective cap, that is, a conductive film such as a connection wiring formed on the substrate 1 extends out of the protective cap. It is an electrode terminal.

In the display device as described above, components such as an electrode assembly substrate provided in the stem and the protective cap have a simplified configuration. This makes it much easier to miniaturize the display device. Moreover, since many electrically conductive adhesives are used in the place connected inside, workability and reliability also improve significantly.

However, when manufacturing a display device having such a configuration, it is necessary to provide a grid 8, a cathode 9, and the like opposite to each of the segment electrode groups 2 on the substrate at the correct position. The assembly of electrodes requires complicated and sophisticated tools, and also requires considerable skill and process water.

In such a display device, since an external terminal uses a so-called print terminal made of a conductive film coated on a substrate, in order to connect an external circuit to this terminal, for example, a substrate portion having a print terminal can be inserted. Terminal sockets having a structure with a plurality of terminal pins or connecting wires drawn out to the outside by making a socketable part securely contacting each of the multiple printed terminals on the substrate within the socket part, ie, It is necessary to say that it is a connector for a printed board, and such a terminal connector has a problem in that its structure is complicated and requires considerable precision, which is expensive.

The present invention is to provide a method of manufacturing a display device that solves the above-mentioned problems. In other words, the display device of the present invention is a multi-stage fluorescent display device in which a plurality of pattern display portions composed of segment electrodes coated with phosphors are provided in a protective cap formed by welding a substrate and a top window plate, and a pattern display portion is disposed on a substrate. Multi-stage fluorescent light having a configuration in which grid terminal lead-in wires integrally connected to at least each grid or spacers fixed to each grid, and cathode terminal lead-in wires integrally connected to the negative electrode support part are led through the welded portion of the substrate and the upper window panel. A method of manufacturing a display device and a method of manufacturing a device related thereto.

Hereinafter, the display device of the present invention will be described in detail with reference to FIGS. 2 to 4.

In the figure, reference numeral 12 denotes a substrate made of an insulating material such as glass or ceramic. On the substrate 12, a plurality of wiring films 13 for electrically connecting adjacent common segment electrodes, an insulating film 14 for insulating each wiring film 13 and each of the segment electrodes, and a plurality of pattern display sections A plurality of segment electrodes 16, the phosphors 17, and the like constituting (15) are sequentially stacked and disposed. In the wiring film 13, a connecting portion 13a for connecting with an outgoing segment terminal lead wire and a connecting portion 13b for connecting with a corresponding segment electrode 16 pass through a small hole formed in the insulating film 14, It is installed. Reference numeral 18 denotes a spacer frame which is formed integrally by, for example, photo etching or flatness using a single metal plate.

The spacer frame 18 has a spacer support frame 19 of a planar rectangle larger than the substrate 12, and a plurality of spacer frames 18 arranged at intervals and sizes corresponding to the pattern display portions 15 at the center of the support frame 19. One end is connected to the inlet-shaped spacer 20 of the outer side and the outer edge part which opposes each said spacer 20, and the other end part is an inner edge part which opposes the support frame 19 Several grid terminal lead-in wires 21 serving as parallel straight line spacer support pieces connected to each other, and a proximal end portion at an inner edge of the support frame 19 in the middle of each adjacent grid terminal lead-in line 21 are provided. A plurality of segment terminal lead wires 22 positioned so as to be connected to each of the corresponding wiring films 13, and an end portion connected to the base member and extending in parallel with the grid terminal lead wires 21; Between the inner edges against the support frame 19 on the outside of both spacers 20 It is installed and connected in parallel with the grid terminal lead-in line 21, the middle portion is formed of a pair of left and right cathode terminal lead-in line 23 formed integrally with the negative electrode support.

This spacer frame 18 has at least each grid terminal lead wire 21, each segment terminal lead wire 22, and a negative terminal lead wire 23 having a coefficient of thermal expansion substantially the same as that of the substrate 12 and the upper window panel described later. For example, a glass welding metal made of an alloy such as iron-nickel-cobalt, iron-nickel or iron-nickel-chromium may be used as the material. Although the spacer frame 18 is very effective in shortening the process of making the entire metal for glass welding, the spacer support frame 19 and the spacer 20, which are components of the spacer frame 18, due to material or workability, are used. At least one of the metals other than the glass welding metal, for example, iron, nickel, an alloy of iron and nickel, or stainless steel, and joining and fixing the components made of the glass welding metal by welding and integrally Of course, you may form.

In addition, when making this spacer frame 18, even if it is made only with the metal for glass welding, for example, the spacer which made several segment terminal lead wires 22 separately and removes only the segment terminal lead wire 22 part. It is a matter of course that the frame 18 can be integrally formed by joining and fixing to the frame 18 by welding or the like.

자 모양이나 상변(上邊) 및 하변의 양쪽 또는 한쪽을 지주상(支柱狀)으로 만드는 등, 그 모양을 임의로 만들 수 있음은 물론이다.In addition, the size of each spacer 20 is sized so that each pattern display part 15 and each grid arrange | positioned opposite to this may come to a predetermined relation position, respectively. In addition, although the shape of the support frame 19 of the spacer frame 18 shown in the figure was shown to become a rectangular inlet shape, it is not limited to this shape, For example,

It is a matter of course that the shape can be arbitrarily formed, such as the shape of a ruler, an upper side, and both or one side of a lower side as a support post.

24 is a grid frame having a single metal plate and integrally formed by, for example, photograph etching or a press, in which a plurality of grids 25 each made of a mesh shape are placed in the middle of a planar rectangular frame 26. The linear support pieces 27 protruding from the opposite outer edges of the grid object are supported in parallel at predetermined intervals in accordance with the arrangement of the pattern display section 15.

The grid object 24 is preferably made of a thin metal plate made of a material such as stainless steel, iron, nickel, or an alloy of iron and nickel.

The grid object 24 is placed on the frame 18 formed as described above, and the grids 24 are stacked on each spacer 20 to be fixed by welding or caulking and then integrally formed with each grid 25. The electrode frame 28 is formed by removing unnecessary portions such as the frame 26 and the support piece 27.

In forming the electrode frame body 28, a spacer frame 18 in which a plurality of spacers 20, a plurality of grid terminal lead-in lines 21, a segment terminal lead-in line 22 and a negative terminal lead-in line 23 are integrally formed. And an example in which a grid object 24 in which a plurality of grids 25 are integrally formed are combined. However, the present invention is not limited thereto. For example, at least a plurality of grids and grid terminal tugs that support the grids, respectively. May be formed integrally with one metal plate, and several spacers may be integrally formed, and these may be combined to form an electrode frame. Of course, it can be made in various ways, such as integrally forming in 18 and making an electrode object.

Next, a cathode core, which is integrated with the cathode terminal lead wire 23 of the electrode frame 28, is coated with, for example, a heater core made of a material such as W and a kind of alkaline earth metal oxide having a large amount of electron emission. A cathode 29 called a so-called direct oxide cathode is formed. It goes without saying that the step of attaching the cathode 29 can be performed in the step of fixing the electrode frame 28 to the substrate 12 described later.

Next, the electrode frame body 28 is placed on the substrate 12 on which the pattern display unit 15 is formed, and the spacer frame 20 integrally formed with each grid 25 is aligned on each pattern display unit 15 so that each spacer frame ( 18. The ends of the plurality of segment terminal lead wires 22 disposed on the substrate 12 are electrically connected to each of the segment electrode connecting portions 13a disposed on the substrate 12 by using a conductive adhesive 13c or the like. The electrode assembly board 30 in which the electrode frame body 28 and the negative electrode 29 are integrally assembled to (12) is made.

On the electrode assembly substrate 31, at least the front panel 31 of the pattern display portion 15 is transparent, for example, a glass plate or the like, is placed thereon, and the edge of the welding agent is a glass frit having a low melting point. By firing using (32), it is hermetically welded to form the protective cap 34.

Then, the exhaust pipe 35 for welding the inside of the protective cap 34 is welded. The exhaust pipe 35 may be welded before or after the protective cap 34 is welded, but it may be possible to streamline the work process at the same time when the protective cap is welded. The position at which the exhaust pipe 35 is welded is exemplified in the side portion that is the welded portion of the substrate 12 and the upper window plate 31 in the drawing of the embodiment. However, the exhaust pipe 35 is formed by installing the exhaust pipe 35 at the proper position of the side pipe. Since the display device becomes very thin, it can be suitable for small deposits.

However, the position at which the exhaust pipe 35 is welded is not limited to the side portion, and may be disposed at any position other than the side surface of the protective cap, for example, below the substrate 12 as necessary.

In the sealing portion 33 formed of the welding agent 32 of the protective cap 34, each grid terminal lead-in wire 21, each segment terminal lead-in wire 22, and the negative terminal lead-in wire (integrated with the spacer frame 18) are provided. 23) is penetrated and hermetically sealed.

After welding, the unused portion, the unnecessarily long portion, etc. of the spacer support frame 19 and the terminal lead wires remaining outside the weld portion 33 are appropriately cut out.

As described above, each group of segment electrodes 16 constituting a plurality of pattern display portions is formed at a predetermined relation position in the protective cap 34 in which the substrate 12 and the upper window plate 31 are welded to prevent air from entering. Each grid 25, the cathode 29, and the like are securely disposed and fixed to each internal electrode from the outside through each segment terminal lead wire 22, each grid terminal lead wire 21, and the cathode terminal lead wire 23, and the like. It can be made of a configuration that allows electricity.

As the shape of the upper window plate 31 constituting the window portion of the protective cap 34 in the embodiment illustrated that the bottom is a flat, the inverted boat, but is not limited to this, but the plate-like or arc-shaped It is a matter of course that any shape such as the (bottom) boat shape can be used. In the above-described embodiment, the grid 25 fixed to the spacer frame 18 is an example in which several grids used for one display device are integrally connected to one grid object 24. The grid formed for each spacer 20 of the spacer frame 18 may be fixed by welding or the like, of course.

When the grid frame 24 is placed on the spacer frame 18 and the spacer 20 and the grid 25 are fixed to each other, the spacer frame 18 and the spacer frame 18 may be easily aligned. It is a matter of course to make something like the guide pin hole 36 which is used to adjust the position to the grid frame 24, respectively.

In addition, in the above-described embodiment of the present invention, the terminal lead-in wire of each electrode disposed in the welding portion 33 indicates that it is disposed up and down in a direction perpendicular to the longitudinal direction of the display device, but is not limited thereto. Can be arbitrarily disposed, for example, in a direction perpendicular to the longitudinal direction of the display device, or one part in the longitudinal direction.

Further, in the embodiment of the present invention, the connecting portion 13a for connecting with the segment terminal inlet line 22 of the plurality of wiring coatings 13 provided on the substrate 12 is formed of the substrate 12 and the upper window plate 31. Exposed to the protective cap 34 to be described, but is not limited to this, as in the other embodiment shown in Figure 5, each connection portion of the plurality of wiring coating 13 coated on the bottom plate 12 13d extends to the distal end 37 of the substrate 12 to form an external printed terminal, and the distal end 37 of the substrate 12 on which the connection portion 13d is formed is the substrate 12 and the upper window plate 31. Exposed to be outside the protective cap 34 is formed of a).

At this time, the segment terminal lead wire through which the sealing part 33 of the board | substrate 12 and the top window plate 31 penetrates disappears, and is arrange | positioned at the terminal part 37 of the board | substrate 12 which becomes out of the protective cap 34. Each connecting portion 13d is used as an external printed terminal of each segment electrode. That is, in order to connect this connection part 13d to an external circuit, each segment terminal line (not shown) connected to an external circuit may be connected directly by soldering, etc., or only this part may be connected using a printed circuit board connection port. .

In addition, although the embodiment of the present invention described above does not mention the provision of a getter in the display device, the getter can be disposed at any position in the protective cap.

In the display device of the present invention, a getter can be provided reasonably by providing a getter support piece that is sealed or sealed through a welded portion between the substrate and the upper window panel, and the getter is attached to the getter support piece. If the getter support piece is formed integrally with the spacer frame 18 in advance, the getter can be more reasonably equipped.

In the above-described embodiment of the display device of the present invention, the mounting direction of the cathode 29 is illustrated in the longitudinal direction of the display device, but the present invention is not limited thereto. Each pattern display unit is perpendicular to the length direction of the display device. Of course you can face each other and excrete. Further, the negative electrode lead wire 23 may be extended as a printing method.

Since the manufacturing method of the display device of the present invention has the above-described configuration and manufacturing process, it has various characteristics as follows. That is, since the substrate forming the pattern display portion also serves as a protective cap, and all or most of the external terminals of each electrode use a terminal lead wire formed integrally with the spacer and the grid without using printed wiring on the substrate. It is characterized by the fact that the display device, especially the protective cap, can be made very small.

In addition, when the exhaust pipe is disposed sideways as described in the embodiment, the thickness of the display device can be made very thin, which makes it easy to use a small product that is particularly suitable for portable small consignment.

In the manufacturing method of the present invention, since the protective cap has the above-described configuration, the substrate and the upper window panel, which occupy most of the weight of the display device, can be made very small, so that the multi-stage display device with many pattern display parts can be made very light. have.

Such a compact and lightweight display device is not only very advantageous for use in depositing, but also for the manufacturing equipment, tools, and manufacturing processes necessary for manufacturing the display device, particularly for welding, exhausting, and etching. Handling is digested in the city, and mass production and economic efficiency are also improved.

When manufacturing the display device of the present invention, since the grid spacers of all the pattern display parts disposed in the display device are made by constantly arranging one metal plate and connecting them with terminal lead wires, they can be attached to the substrate at once. As before, complicated tools and complicated operations for fitting and attaching spacers and grids to each pattern display unit on the substrate can be greatly simplified, greatly improving workability and improving assembly accuracy. There is an excellent effect to make this uniform product.

In the manufacture of the display device of the present invention, all external terminals use a terminal inlet line formed integrally with the spacer, and the terminal inlet line is formed by using a deposition agent such as glass frit having a low melting point on the substrate and the upper window panel. In the case of plastic welding, it is made by sealing at the same time with airtight sealing, so there is no need for a stem, and there is a characteristic that the connection place such as internal welding can be made very small.

In the manufacturing method of the present invention, a printed circuit board made of a so-called print method is used, in which a plurality of pattern display portions formed by a plurality of segment electrodes coated with phosphors are superimposed on a substrate together with a connection wiring film, an insulation film, a phosphor, and the like, which is a protective cap In spite of its structure, the external terminal does not use the printed wiring part, but the terminal lead wire is used in principle. It does not need to be used, for example, it has a feature that it can be installed by connecting terminal lead wires of each electrode directly to a printed circuit board such as an electric charge lamp.

Therefore, the space occupied even in the case of installation inside a consignment is small, the whole can be made small and light, and it is very advantageous in the economical efficiency by reducing the cost of components or installation.

As described above, the manufacturing method of the present invention has various excellent features, and therefore, is particularly suitable for the production of small-size consignments, which are excellent in mass productivity, reliability and economy.

Claims (1)

The grid terminal lead-in line 21 is included in any one of a plurality of grids 25 set to correspond to each of the multi-stage pattern display portions 15 disposed on the substrate 12 or spacers 20 fixed to each grid and forged shape. , And the other end of the grid terminal lead wire 21 is integrally connected with the support frame 19, and the other end of the negative electrode terminal lead wire 23, in which the negative electrode 29 support portion and the front end portion are integrally supported, is also installed. Manufacturing process of the electrode frame body 28 integrally connected to the frame 19, and this electrode frame body 28 is located on the pattern display part 15 corresponding to each grid 25, and the board | substrate 12 The top of the window panel 31 by manufacturing the electrode assembly board 30 to attach the necessary parts such as the necessary connection fixing and the cathode, and at least each terminal lead wire to be guided through the electrode assembly board 30. To put on and protect the main welding 34, the manufacturing process, and the protective cap 34, the support frame 19 and the terminal number of the multi-stage process for producing a fluorescent display device which comprises a removal step of removing the unnecessary portion of the lead-in after the manufacturing process.

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