KR790001724B1 - Multi-digit fluorescent indicating apparatus - Google Patents

Abstract

A multi-digit fluorescent indicating apparatus was composed of; a base plate (12), a window platc(31) forming an evacuated enclosure, a sepmented electrode (16) means forming each of multidigit fluorescent indicating patterns, a plurality of grid terminal leadin wires (21), a spacer element, a plurality of cathode terminal lead-in wires (23),and the grid terminal lead-in wires and the cathede terminal lead-in wires providing con- venient external connections.

Description

Multistage Fluorescent Display

1 (a) and (b) are a one-part cutaway plan view and an A-A cut sectional view showing an example of a conventional multi-digit fluorescent display tube.

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

2 (a) and (b) are a cutaway 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 in FIG. 2A.

(A), (b) and (c) is a perspective view of a spacer frame grid frame and a main portion of a substrate.

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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat multi-digit fluorescent display device for use 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 is placed so as to face the pattern display part. a grid and a cathode are 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 two substrates is formed in a plate shape having a transparent window portion; In addition, one is secured in a protective cap formed by sealing the bottom of a flat boat, which is formed in an inverted shape, and airtightly sealing a lead wire at at least one end thereof. ) A structure having a structure formed by disposing a stem portion through which it is allowed to pass through and hermetically sealing it is used.

The conventional structure having such a structure is to form a display electrode assembly with a plurality of pattern display portions and a stem portion through which a plurality of lead wires are encapsulated, and the combinations are accelerated, and then fixed in a protective cap and hermetically welded. . Therefore, in the case where the display electrode assembly and the stem portion are pointed together, several internal pointed wirings are congested and become very complicated. Therefore, it is difficult to miniaturize the size and the number of processes required for combinational 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 previous problems as described above, for example, a display device as described in Japanese Patent Laid-Open No. 48-62378 has been proposed. As shown in the first and second embodiments (a) and (b), the display device constitutes each of several patterns to be displayed first on a substrate 1 made of an insulating material such as glass or ceramic. Conductive coatings such as the electrical connection wiring 3, the lead conductor 4, the terminal 5, and the segment electrodes 2a-2h according to the arrangement of the segment electrode groups 2; A forint substrate 1a is formed by stacking insulating films 6 and the like that insulate them, and a phosphor pattern 7 is coated on each segment electrode 2a-2h to form an anode pattern display portion, and each segment 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 the electrode group 2 with the printed circuit board 1a. And the electrode portions on these substrates are vacuum-tight formed with a printed board 1a and a top window plate 11 welded thereon. It is installed in a configuration in hokaep. 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 segment electrode group 2 on the substrate at the correct relation 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. Normally print terminal sockets with multiple terminal pins or connecting leads drawn out by making a socket part which can be connected to the socket and making sure to contact each one of several printed terminals on the board within the socket part. It is necessary to say it is a board | substrate connection port, and since such a terminal connector is complicated in structure and requires considerable precision, it has a problem that it becomes expensive.

The present invention is to provide 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 a grid terminal lead-in wire integrally connected to at least each grid or a spacer fixed to each grid and a cathode terminal lead-in wire connected integrally with the negative electrode support part are penetrated through the welding portion between the substrate and the upper window panel. It relates to a display device.

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

12 is 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, 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 in which a single metal plate is used to form an integral part, for example, by photo etching or press in a photograph.

는 대응하는 각 배선피막(13)과 접속되도록 위치가 정해진 여러개의 세그먼트 단자인입선(22)과, 양쪽 스페이서(20)의 바깥쪽에 있는 지지틀(19)에 대향하는 내연부사이에 그리드단자 인입선(21)과 평행하게 설치 연결되고, 중간부에는 음극지지부가 일체로 형성된 좌우 한쌍의 음극단자인입선(23)으로 형성되어 있다.The spacer frame 18 includes a spacer support frame 19 having 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 and the outer edge part which opposes each said spacer 20, and the other end is an inner edge part which opposes the support frame 19 A proximal end portion is provided on the inner edge of the support frame 19 in the middle of the grid line 21, which is a plurality of grid terminals serving as spacer support pieces having parallel linear shapes connected thereto, and adjacent grid terminal lead-in lines 21. An end part connected to the base station and extending parallel to the grid terminal lead-in line 21.

Is a grid terminal lead wire between a plurality of segment terminal lead wires 22 positioned to be connected to respective corresponding wiring films 13, and an inner edge portion opposed to the support frame 19 on the outside of both spacers 20. 21) is installed and connected in parallel, the middle portion is formed of a pair of left and right negative electrode terminal inlet line 23 formed integrally with the negative electrode support.

This spacer frame 18 has at least each grid terminal lead-in line 21, each segment terminal lead-in line 22 and the negative terminal lead-in line 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, glass welding metals 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, which is integrally formed by welding and joining the components made of the glass welding metal and welding. Of course, you may form.

The spacer frame 18 is also made of, for example, a glass welding metal only. For example, a plurality of segment terminal lead wires 22 are separately made, and the spacer frame made of only the segment terminal lead wire 22 is removed. 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.

모양이나 상변(上邊) 및 하변의 양쪽 또는 한쪽을 지주상(支柱狀)으로 만드는 등, 그 모양을 임의로 만들수 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, the upper side and the lower side, or both sides of the lower side can be arbitrarily made, such as making the post form.

(24) has a single metal plate, for example, a grid frame formed integrally by, for example, photograph etching or fortress, and each of the grids 25 made of mesh shapes in the middle of the planar rectangular frame 26 The linear support piece 27 protruding from the opposing outer edge of the grid frame has a shape supported in parallel at predetermined intervals in accordance with the arrangement of the pattern display section 15.

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

In forming the electrode frame 28, a spacer frame 18 in which a plurality of spacers 20, a plurality of grid terminal lead-in wires 21, a segment terminal lead-in wire 22, and a negative electrode terminal lead-in wire 23 are integrally formed. And an example in which a plurality of grid frames 24 are formed integrally with each other, but the present invention is not limited thereto. For example, at least several grids and grid terminal tufts that support the grids, respectively. May be formed integrally with one metal plate, and several spacers may be integrally formed and combined to form an electrode frame, or a spacer having a shape of a grid without forming a grid and spacers may be framed. Of course, it can be made in various ways, such as integrally forming in 18 and making an electrode frame body.

Next, an alkaline earth metal oxide type having a large amount of electron emission is coated on a heater core made of a material such as W line, for example, on a negative electrode support unit integrated with the negative electrode terminal inlet line 23 of the electrode frame body 28. A negative electrode 29 called a so-called direct-oxide oxide cathode is attached. It is a matter of course that the step of attaching the cathode 29 can be performed in the step of fixing the electrode frame body 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 spacers 20 integrally formed with the grids 25 on each pattern display unit 15 are aligned to 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 using a conductive adhesive 13c or the like, and fixed to each other. The electrode assembly substrate 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 top of the pattern display portion 15 is transparent, for example, an upper window plate 31 made of, for example, a glass plate, and the edge is welded to a glass frit having a low melting point. By firing using the ashes 32, they are hermetically welded to form the protective cap 34. And the exhaust pipe 35 for welding the inside of this 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 at the side surface, which is a 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 an appropriate position of the side surface. Since the display device becomes very thin, it can be a perfect fit for small deposits. However, the position at which the exhaust plate 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 part 33 formed of the welding material 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 which are integrally provided with the spacer frame 18 ( 23) is penetrated and hermetically sealed. After welding in this way, the spacer support frame 19 which remains outside the welding part 33, and the part which is not used in the terminal lead-in line, an unnecessarily long part, etc. are cut suitably.

As described above, each of the group of segment electrodes 16 constituting a plurality of pattern display portions at predetermined relational positions in the protective cap 34 in which the substrate 12 and the top window plate 31 are welded to prevent air from entering. The grid 25, the cathode 29, and the like are securely disposed and fixed, and electricity is supplied from the outside to each internal electrode through the segment terminal lead-in line 22, the grid terminal lead-in line 21, and the cathode terminal lead-in line 23, and the like. You can create something that works.

As the shape of the upper window plate 31 constituting the window portion of the protective cap 34 in the embodiment has been illustrated to be inverted in the form of a flat bottom boat, but is not limited to this, but is not limited to the plate or arc shape ( Of course, it can be used in any shape such as the vault shape. 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 formed and connected to one grid frame 24. However, the present invention is not limited thereto. 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 in position, for example, the spacer frame 18 and the grid may be easily fitted. Of course, it is good to make the same thing as the guide pin hole 36 used to adjust the position to the 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 is shown to be disposed up and down in a direction perpendicular to the longitudinal direction of the display device. Of course, it can be arbitrarily disposed, such as making in one direction perpendicular to the longitudinal direction of the apparatus, or making one part in the longitudinal direction. Further, in the embodiment of the present invention, the connecting portion 13a for connecting with the segment terminal lead-in wires 22 of the plurality of wiring coatings 13 provided on the substrate 12 is formed of the substrate 12 and the upper window panel 31. Exposed to the protective cap 34 to be described, but is not limited to this, as in the other embodiment shown in FIG. 5, each connection portion of the plurality of wiring coating 13 coated on the substrate 12 The end portion 37 of the substrate 12 having the connection portion 13d formed by extending the end portion 13d of the substrate 12 to the end portion 37 of the substrate 12 is formed of an external printed terminal. It may be provided only the protective cap 34 formed of a).

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

Incidentally, in the above-described embodiment of the present invention, although no mention is made of mounting 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 penetrated by a welding portion between the substrate and the upper window plate, and the getter is attached to the getter support piece. If such a getter support piece is formed integrally with the spacer frame 18 in advance, the getter can be more reasonably mounted.

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 is not limited thereto. Each pattern is perpendicular to the longitudinal direction of the display device. Of course, you can face up rather than mark. In addition, the cathode terminal lead-in line 23 may be extended as a printing method.

Since the display device of the present invention is configured as described above, it has various features as follows. That is, the substrate forming the pattern display portion also serves as a protective cap, and all or most of the external terminals of each electrode are configured to use terminal lead lines formed integrally with the spacer and the grid without using printed wiring on the substrate. In particular, the display device can be made particularly small in size.

In addition, when the exhaust pipe is arranged 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 display device 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, are extremely small, and the multi-stage display device with many pattern display parts can be made very light. 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 required for manufacturing the display device, particularly for welding, exhausting, and etching. The handling of the city is simplified, and the mass production and economic efficiency are also improved.

When manufacturing the display device of the present invention, the grid spacers of all the pattern display parts disposed in the display device are arranged by a single metal plate and connected by a terminal lead wire, which can be attached to the substrate at once. As a result, complicated tools and complicated operations for fitting and attaching spacers and grids to each of the pattern display units installed on the substrate as in the past can be greatly simplified, greatly improving workability and improving assembly accuracy. There is an excellent effect to make a product of uniform quality.

In the display device of the present invention, all the external terminals use terminal lead wires formed integrally with the spacer, and the terminal lead wires can be plastically welded to the substrate and the upper window panel using a welding agent such as glass frit having a low melting point. At the same time, since it is made to be sealed through at the same time, there is no need for a stem, and there is a feature that the number of connected places such as internal welding can be very small.

The display device of the present invention uses a printed circuit board made of a so-called printing method in which a plurality of pattern display portions formed of 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. In spite of the double structure, the external terminal does not use the printed wiring part, but the terminal lead wire is used in principle. Therefore, when connecting to an external circuit, an expensive printed circuit board connection port is used as a medium. There is no need, and there is a characteristic that the terminal lead wire of each electrode can be directly connected to a printed circuit board, such as an electroplating apparatus, for example. 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 economy etc. which come with the cost saving of a component or an installation.

As described above, since the display device of the present invention has various excellent features, it is compact, light weight, easily connected to a use circuit, and is particularly suitable for small size entrustment, which is excellent in mass productivity, reliability, and economy.

Claims (1)

A pattern display part composed of a segment electrode 16 coated with a phosphor 17 in a protective cap 34 formed by sealing the substrate 12 and the upper window plate 31. In a multi-digit fluorescent display device having multiple stages 15, the pattern display unit 15 is disposed on the substrate 12 and fixed to each grid 25 or each grid. A grid terminal lead wire 21 integrally connected to at least one of the spacers 20 and a cathode terminal lead wire 23 integrally connected to the support of the negative electrode 29 and the substrate 12 and the upper window plate 31; A multi-stage fluorescent display device having a configuration derived by penetrating the welding portion 33 of the.

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