JPH0644001U - Double-sided fluorescent display tube - Google Patents

Abstract

(57) [Summary] [Purpose] In a fluorescent display tube in which both sides of an envelope in which plate materials are assembled emit light, external terminals connected to both light emitting sections are pulled out in a line from the same sealing section. [Structure] On each inner surface of a substrate 3 and a front plate 20 which are sealed via a side plate 40, anodes 11 and 25 serving as a light emitting display unit are provided.
Are provided respectively. The front plate 20 emits light from both anodes.
Observe through. The side plate 40 and the sealing portion of the substrate 3 are
Two types of external terminals 34 and 35 are sandwiched and fixed. The external terminal 34 is bent downward and comes into spring contact with the board-side terminal 5.
The external terminal 35 is bent upward and comes into spring contact with the front plate side terminal 22.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a double-sided emission type fluorescent display tube in which light-emission display is performed on both sides of an envelope.

[0002]

[Prior art]

 2. Description of the Related Art There is known a fluorescent display tube in which a light emitting display section is provided on each of a substrate side of an envelope and a front plate side facing the substrate, and the light emission of both light emitting display sections is observed from the front plate side. This type of fluorescent display tube is also described in, for example, Japanese Patent Publication No. 56-11988, but its front plate has many flat-bottomed ship-shaped molding fronts 100 as shown in FIG. 5 and is guided to the substrate 101 side. The wiring pattern 102 could be made of ITO on the inner surface of the molding front.

However, the molding front 100 has a problem in that the cost is high because a molding die has to be formed, and therefore, an assembly front combining a front plate with a frame-shaped side plate is currently used. It is like this. In the case of the assembly front, it is difficult to form the wiring like the molding front, and it is also described in Japanese Patent Laid-Open No. 59-1111239, and as shown in FIG. The wiring was taken out to each, and the external terminals 202 and 203 were attached, respectively.

[0004]

[Problems to be solved by the device]

 According to the conventional fluorescent display tube in which the external terminals are provided on both sides of the front plate and the substrate in the envelope of the assembled front structure, there are the following problems depending on the structure of the external terminals. (1) When using external terminals made of metal on both the front plate side and the substrate side and penetrating the sealed parts of the envelope respectively. When assembling a metal external terminal that comes into spring contact with the terminal inside the package with the package before sealing, place the external terminal on the board and then mount the front plate to remove the front plate. Since it was difficult to see the tip of the terminal part through it, it was difficult to align the end part of the external terminal and the terminal part of the front plate. Since the sealed portion through which the external terminal penetrates is in two parts, the probability of occurrence of a leak failure increases.

(2) When external terminals are externally attached after sealing the envelope. Terminals for external attachment of external terminals shall be provided on the board and front plate outside the envelope. Therefore, the envelope becomes large, the display density is lowered, and a small fluorescent display tube cannot be formed. Since the substrate and the front plate protrude more outward than the side plate, which is the outside of the envelope, the parts are easily damaged during transportation.

According to the present invention, in a double-sided emission type fluorescent display tube having an envelope formed by combining a front plate, a substrate and a side plate, a large number of external terminals are gathered in one sealing portion of the front plate or the substrate. The purpose is to allow them to be installed side by side.

[0007]

[Means for Solving the Problems]

 The double-sided emission type fluorescent display according to claim 1 has an envelope in which a frame-shaped side plate is sealed between a substrate and a front plate facing each other, and the wiring pattern and the wiring pattern are formed on the inner surface of the substrate. In a double-sided light-emitting fluorescent display tube having connected board-side terminals and having a wiring pattern on the inner surface of the front plate and front-plate-side terminals connected to the wiring pattern, A plurality of external terminals are sandwiched and sealed between one side plate and the side plate, and a part of the external terminals contacts the board side terminal or the front plate side terminal inside the envelope, and It is characterized in that a part of these contacts with the front plate side terminal or the board side terminal.

According to a second aspect of the present invention, there is provided a double-sided emission type fluorescent display tube having an envelope in which a frame-shaped side plate is sealed between a substrate and a front plate facing each other, and an inner surface of the substrate is provided with a wiring pattern and A substrate-side terminal connected to the wiring pattern, an insulating layer covering the wiring pattern, an anode conductor provided on the insulating layer and connected to the wiring pattern, a phosphor layer provided on the anode conductor, and the fluorescent material. A front surface side terminal connected to the wiring pattern and a light transmission connected to the wiring pattern; and a wiring pattern on the inner surface of the front board. Of a phosphor layer provided on the anode conductor, a phosphor layer provided on the anode conductor, and a mesh grid provided at a predetermined distance from the phosphor layer. The above A double-sided emission type fluorescent display tube configured to be observed through a face plate, comprising a plurality of external terminals sandwiched and sealed between one of the substrate or the front plate and the side plate, Inside, a part of the external terminal abuts on the board side terminal or the front plate side terminal, and the other part is bent and abuts on the front board side terminal or the board side terminal. There is.

[0009]

[Action]

 The shape of the external terminals inside the envelope is determined to be different from each other depending on whether it is connected to the board side or the front side. It can be sandwiched between the side plates and arranged in a line.

[0010]

【Example】

 With reference to FIGS. 1 to 3, a dual emission type fluorescent display tube 1 according to an embodiment of the present invention will be described according to its manufacturing process. (1) Manufacturing process of anode substrate 2 (see FIG. 1) A wiring pattern 4 and a substrate-side terminal 5 are formed of an Al thin film on a glass substrate 3 by a photolithography method. A black insulating layer 7 having through holes 6 is formed on the wiring pattern 4 by a printing method. This insulating layer 7 serves as a black background for improving the contrast of light emission display. Further, the sealing material 8 is printed around the substrate 3 along with the formation of the insulating layer 7. These are baked and fixed to the base.

A predetermined pattern of anode conductor 9 made of graphite is formed on the through hole 6 of the insulating layer 7 by a printing method, and is connected to the wiring pattern 4 through the through hole 6. The anode conductor 9 is also fired and fixed to the base.

A phosphor layer 10 is formed on the anode conductor 9 by a printing method, and the phosphor layer 10 is baked and fixed to form an anode 11. A mesh grid 12 is arranged above the anode 11 at a predetermined interval. The mesh grid 12 is connected to the grid wiring provided on the substrate 3 with a conductive adhesive.

(2) Manufacturing Process of Front Plate 20 (Refer to FIG. 1) Wiring pattern 21, front plate side terminal 22 and light transmitting property are provided on the inner surface of front plate 20 made of translucent glass or the like. The anode conductor 23 is formed of Al thin film by the photolithography method. The wiring pattern 21 has a width of about 30 μm, and the anode conductor 23 is formed in a mesh shape so as to have translucency.

A phosphor layer 24 is formed on the anode conductor 23 to form an anode 25. A printing method or an electrodeposition method can be adopted for the deposition of the phosphor. A mesh grid 26 is arranged above the anode 25 at a predetermined interval. The mesh grid 26 is connected to the grid wiring provided on the front plate 20 with a conductive adhesive.

(3) Manufacturing Process of Spacer Frame 30 (Refer to FIGS. 2 and 3) The pair of cathode supports 31, 31 are connected to each other by a connecting bar 32 between their respective one ends. A frame member 33 is provided between the other ends of the cathode supports 31. The frame member 33 is provided with a plurality of external terminals 34, 35 connected to each cathode support 31, the substrate side terminal 5, and the front plate side terminal 22. Of the external terminals, the external terminal 34 connected to the board-side terminal 5 is bent downward to form a "V" shape when the board 3 is on the lower side as shown in FIG. 3 (a). The external terminal 35 connected to the front plate side terminal is bent so as to face upward at a substantially right angle as shown in FIG.

A filament-shaped cathode 36 is welded and fixed between the cathode supports 31 and 31 under a predetermined tension.

(4) Assembly / imposition step (see FIGS. 1 and 2) The spacer frame 30 is aligned on the anode substrate 2, and the tips of the external terminals 34 formed downward are connected to the substrate side terminal. Abut on 5. A conductive adhesive may be applied to the board-side terminals 5.

On the spacer frame 30, a frame-shaped side plate 40 in which four glass plates are adhesively molded in a frame shape is placed. Further, the front plate 20 is aligned and placed on the side plate 40, and the tips of the external terminals 35 formed upward are brought into contact with the front plate side terminals 22.

The anode substrate 2, the side plate 40, and the front plate 20 assembled by aligning with each other as described above are pressed from above and below with an appropriate jig to a temperature of about 450 ° C. in a CO ₂ gas atmosphere. Heat and seal each other.

According to the double-sided emission type fluorescent display tube 1 manufactured through the above steps, all the external terminals 34 and 35 are led out only from the sealing portion between the side plate 40 and the substrate 3 and arranged in a line. Are lined up. In the envelope, since the ends of the external terminals 34 and 35 are bent and formed to have an appropriate angle and shape to have a spring property, the terminals 5 on the board side or the terminals 22 on the front plate side are connected to each other. They are surely in contact with each other. In this display tube, the light emission display by each anode 11, 25 is observed through the front plate 20.

According to the embodiment of the present invention described above, the spacer frame 30 is sandwiched between the substrate 3 and the side plate 40. However, the spacer frame 30 may be sandwiched between the front plate 20 and the side plate 40. it can. Further, the shape of the external terminals 34 and 35 in the envelope described in the embodiment is an example, and for example, as shown in FIG. 4, when the shape such as the bending angle is appropriately changed to contact the terminal portion. The springiness of may be adjusted.

[0022]

[Effect of device]

 (1) In the dual emission type fluorescent display tube of the present invention, the external terminals are juxtaposed in a line from the sealing portion at one place, so that it can be easily mounted on a PCB provided with a driving circuit. (2) Since the positions of the external terminals are the same as those of the conventional single-sided light emitting type fluorescent display tube, the manufacturing equipment and the inspection equipment can be shared during the manufacturing process.

[Brief description of drawings]

FIG. 1 is a cross-sectional view in one manufacturing process of an embodiment of the present invention.

FIG. 2 is a plan view of a substrate and a spacer frame in one manufacturing process of an embodiment of the present invention.

FIG. 3 is a view showing a shape of an external terminal according to an embodiment of the present invention.

FIG. 4 is a diagram showing another example of the shape of the external terminal according to the embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional dual emission type fluorescent display tube.

FIG. 6 is a cross-sectional view of a conventional dual emission type fluorescent display tube.

[Explanation of symbols]

 1 Double-sided emission type fluorescent display tube 3 Substrate 4,21 Wiring pattern 5 Substrate side terminal 7 Insulating layer 9,23 Anode conductor 10,24 Phosphor layer 12,26 Mesh grid 20 Front plate 22 Front plate side terminal 34,35 External terminal 40 Side plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Iwasa 629 Oshiba, Mobara-shi, Chiba Futaba Electronics Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. An envelope having a frame-shaped side plate sealed between a substrate and a front plate facing each other, and a wiring pattern and a substrate-side terminal connected to the wiring pattern on an inner surface of the substrate. Then, in the double-sided emission type fluorescent display tube having a wiring pattern on the inner surface of the front plate and a front plate side terminal connected to the wiring pattern, between the substrate or one of the front plate and the side plate. A plurality of external terminals that are sandwiched and sealed; inside the envelope, a part of the external terminals abuts the board-side terminal or the front plate-side terminal, and the other part of the external terminal is the front-plate-side terminal Alternatively, a double-sided emission type fluorescent display tube is characterized in that it comes into contact with the substrate side terminal. 2. An enclosure having a frame-shaped side plate sealed between a substrate and a front plate facing each other, wherein an inner surface of the substrate has a wiring pattern, a substrate-side terminal connected to the wiring pattern, and the terminal. An insulating layer covering the wiring pattern, an anode conductor provided on the insulating layer and connected to the wiring pattern, a phosphor layer provided on the anode conductor, and a mesh grid provided at a predetermined distance from the phosphor layer. A wiring pattern on the inner surface of the front plate, terminals on the front plate connected to the wiring pattern, a transparent anode conductor connected to the wiring pattern, and a phosphor layer provided on the anode conductor. And double-sided light emission including a mesh grid provided at a predetermined distance from the phosphor layer, and configured to observe the light emission of each phosphor layer on the substrate and the front plate through the front plate. In a fluorescent display tube, a plurality of external terminals are sandwiched and sealed between one of the substrate or the front plate and the side plate, and inside the envelope, a part of the external terminals is the substrate. A double-sided emission type fluorescent display tube, characterized in that it comes into contact with a side terminal or the front plate side terminal, and the other part is bent and comes into contact with the front plate side terminal or the substrate side terminal.