JP3058120B2 - Dual-sided fluorescent display tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a double-sided fluorescent display device in which light is displayed on both sides of an envelope.

[0002]

2. Description of the Related Art A double-sided fluorescent display tube is known in which a light emitting display portion is provided on a substrate side of an envelope and on a front plate side facing the envelope side. The two-sided fluorescent display tube is of a type in which two light-emitting display portions are observed from the front plate side of the envelope, and a type in which the light-emitting display portion on the front plate side is observed from the front plate side and from the substrate side. A type in which a light-emitting display portion on a substrate side is observed is known.

FIG. 3A is a sectional view of a double-sided fluorescent display tube 100. The double-sided fluorescent display tube 100 has a box-shaped envelope formed by assembling an anode substrate 101 made of glass, a front plate 102 and a side plate 103. Anode substrate 1
A light-emitting display unit (not shown) is formed on the inner surface of the light-emitting element 01. The light emission of the light emitting display unit on the anode substrate 101 side is based on the front plate 1
02 from the outside through the front plate 102. A light-emitting display unit (not shown) is formed on the inner surface of the light-transmitting front plate 102. Light emission of the light emitting display unit on the front plate 102 side is observed through the front plate 102 from outside the front plate 102.

On the inner surface of the anode substrate 101, the anode substrate 10
There is a substrate side terminal 104 connected to the light emitting display unit on one side. On the inner surface of the front plate 102, there is a front plate side terminal 105 connected to the light emitting display unit on the front plate 102 side. The board side terminal 104 and the front plate side terminal 105 are provided with a plurality of external terminals 106 and 107. Of the external terminals, an external terminal 10 connected to the substrate-side terminal 104
As shown in FIG. 3 (c), the substrate 6 is bent downward when the substrate 101 is on the lower side, and is formed in an "H" shape. The external terminal 107 connected to the front plate side terminal 105 is shown in FIG.
As shown in (b), it is bent substantially at right angles so as to face upward, and is formed in a "<" shape. In FIG. 3A, two types of external terminals 106 and 10 having different shapes are shown.
7 are arranged in a direction perpendicular to the paper surface, and are partially overlapped.

The external terminals 106 and 107 are sandwiched and fixed to a sealed portion of the envelope, and are led out of the envelope through the sealed portion in an airtight manner.

[0006]

In the conventional double-sided light emitting fluorescent display tube as described above, the terminal portions on the substrate side and the front plate side are connected to separate external terminals having different structures, respectively. There is a problem that two types of external leads are prepared and the number of the external leads is large because of the structure leading out. That is, in the above-described structure, each substrate side terminal 104 on the anode substrate 101 side and each front plate side terminal 105 on the front plate 102 side.
, External terminals are individually connected to each other and drawn out of the envelope. Therefore, two types of external terminals are required in accordance with the positions of the terminals, and the number of external terminals is two.
04 and 105 are required.

As described above, in the conventional double-sided light emitting fluorescent display tube, the number of external terminals increases, so that the size of the envelope must be increased regardless of the display area. If the size of the enclosure is to be set to a standard size suitable for the display area, the arrangement pitch of the large number of external terminals must be reduced. Will rise.

In the conventional double-sided light emitting fluorescent display tube, different types of external terminals are mixed, so that it is difficult to adjust the mold in the pressing step, and to connect each terminal in the envelope in the assembling step. Alignment was difficult.

According to the present invention, in a double-sided light emitting fluorescent display tube having an envelope formed by combining a front plate, a substrate and a side plate, the type and number of external terminals are reduced, and the outer shape of the envelope is made smaller than before. It is intended to be compact.

[0010]

According to a first aspect of the present invention, there is provided a double-sided light emitting 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. An inner surface of the display panel has a substrate-side light-emitting display unit and a substrate-side terminal connected to the substrate-side light-emitting display unit. An inner surface of the front plate is connected to the front-plate-side light-emitting display unit and the front-plate-side light-emitting display unit. In the double-sided emission type fluorescent display tube having a front plate side terminal, and sandwiched and sealed between the substrate or one of the front plate and the side plate, the substrate side terminal and the inside of the envelope A plurality of external terminals contacting the front plate side terminal are provided.

The double-sided fluorescent display tube according to the second aspect is the dual-sided fluorescent display tube according to the first aspect.
A first portion in which the external terminal is sandwiched and sealed between one of the substrate or the front plate and the side plate, and a continuous at a predetermined angle with respect to the first portion in the envelope; And a corner portion of the first portion and the second portion is connected to one of the substrate-side terminal or the front plate-side terminal, and a tip of the second portion is the substrate. The terminal is connected to the other of the side terminal and the front plate side terminal.

According to a third aspect of the present invention, there is provided a dual-sided fluorescent display tube according to the second aspect.
The second portion is formed in a shape having a spring property.

According to a fourth aspect of the present invention, there is provided a dual-sided fluorescent display tube according to the first aspect.
Inside the envelope, a cathode that emits electrons, a substrate-side control electrode that controls electrons emitted from the cathode to project on the substrate-side light-emitting display unit, and an electron that is emitted from the cathode A front panel-side control electrode that controls the front panel-side light-emitting display unit to control the external terminal is driven in a predetermined cycle, and the substrate-side control electrode and the timing are synchronized with the cycle. It is characterized in that the substrate-side control electrode and the front-plate-side control electrode are driven to emit light by applying a selection signal to the front-plate-side control electrode.

According to a fifth aspect of the present invention, there is provided a double-sided light emitting 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 a wiring pattern is formed on an inner surface of the substrate. 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, A substrate-side control electrode provided at a predetermined distance from the phosphor layer; and a wiring pattern on the inner surface of the front plate, a front-plate-side terminal connected to the wiring pattern, and a light-transmitting connected to the wiring pattern. An anode conductor, a phosphor layer provided on the anode conductor, and a front plate-side control electrode provided at a predetermined distance from the phosphor layer, wherein the phosphor layers on the substrate and the front plate are provided. The luminescence of the front In the dual emission type fluorescent display tube configured to be observed through, the substrate or the front plate is sandwiched and sealed between one of the side plates and the substrate side terminal and the inside of the envelope. It is characterized by comprising a plurality of external terminals abutting on the front plate side terminals.

According to a sixth aspect of the present invention, there is provided a double-sided light emitting 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 a wiring pattern is formed on an inner surface of the substrate. And a substrate-side terminal connected to the wiring pattern, a translucent anode conductor connected to the wiring pattern, a phosphor layer provided on the anode conductor, and a substrate side provided at a predetermined distance from the phosphor layer. A control electrode, and a wiring pattern on the inner surface of the front plate, a front plate side terminal connected to the wiring pattern, a light-transmitting anode conductor connected to the wiring pattern, and provided on the anode conductor. A phosphor layer and a front-plate-side control electrode provided at a predetermined distance from the phosphor layer; light emission of the phosphor layer on the substrate is observed through the substrate; Before the body layer emission In the double-sided fluorescent display tube configured to be observed through a plate, the substrate or the front plate is sandwiched and sealed between one of the side plates and the substrate side terminal inside the envelope. And a plurality of external terminals in contact with the front plate side terminals.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A dual emission type fluorescent display tube 1 which is an example of an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, an Al thin film wiring pattern 4 and a substrate terminal 5 are provided on a glass anode substrate 2.
The wiring pattern 4 and the board-side terminal 5 are connected. A black insulating layer 7 having a through hole 6 is provided on the wiring pattern 4. An anode conductor 9 is provided on the through hole 6 of the insulating layer 7, and is connected to the wiring pattern 4 via a conductive material filled in the through hole 6. A phosphor layer 10 is provided on the anode conductor 9, and an anode 11 is formed as a light emitting display. A mesh grid 12 as an anode substrate-side control electrode is disposed above the anode 11 at a predetermined interval.

Front plate 2 made of light-transmitting glass or the like
0, the wiring pattern 21 and the front plate side terminal 22
There is. The wiring pattern 21 and the front plate side terminal 22 are connected. Further, on the inner surface of the front plate 20, a light-transmitting anode conductor 23 connected to the wiring pattern 21 and an anode 25 as a light-emitting display portion composed of a phosphor layer 24 provided on the anode conductor 23 are formed. ing. Above the anode 25 (below in the figure), a mesh grid 26 as a front plate-side control electrode is disposed at a predetermined interval. A filament-shaped cathode 30 is stretched between the mesh grids 12 and 26 in the envelope.

The substrate side terminal 5 and the front plate side terminal 22
Are provided with a plurality of external terminals 50. The external terminal 50 is a member formed by bending a metal member such as a 42-6 alloy (42% Ni, 6% Cr, balance Fe, etc.) by press molding. The external terminal 50 has an elongated flat bar-shaped first portion 51 and a second portion 52 formed by bending the first portion 51 at a predetermined angle. The second portion 52 is formed in a substantially “U” shape, and has a spring property.

The first portion 51 is sandwiched and sealed between the anode substrate 2 and the side plate 40, and the second portion 52 is stored in a state of being bent between the anode substrate 2 and the front plate 20 in the envelope. Is done. The corners 53 of the first portion 51 and the second portion 52 reliably contact the board-side terminals 5 by the spring property of the second portion 52,
In addition, it is securely fixed and connected by a fused terminal paste in which frit glass is mixed with a conductive paste or an intermediate paste which is a conductive paste. Due to the resiliency of the second portion 52, the front end 54 of the second portion 52 is
2 to obtain a reliable electrical connection. In addition to bringing the tip 54 into contact with the terminal 22, more secure electrical connection may be obtained by bonding with the conductive fusion terminal paste or conductive intermediate paste.

The anode substrate 2 and the front plate 20 are sealed by a sealing material 8 with the side plate 40 interposed therebetween, to form a box-shaped envelope. The external terminal 50 is connected to the anode substrate 2 of the envelope.
Side airtightly penetrates the sealing portion and is led out of the envelope.

Next, the manufacturing process of the double-sided fluorescent display tube 1 will be described. (1) Manufacturing Process of Anode Substrate 2 (see FIG. 1) On the anode substrate 2 made of glass, the wiring pattern 4 and the substrate-side terminals 5 are formed of an Al thin film by a photolithographic technique. A black insulating layer 7 having a through hole 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-emitting display. Further, the sealing material 8 is printed around the substrate 3 together with the formation of the insulating layer 7. These are baked and fixed to the base.

An anode conductor 9 having a predetermined pattern 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 via the through hole 6. The anode conductor 9 is also baked and fixed to the base.

A phosphor layer 10 is formed on the anode conductor 9 by a printing method.
Is configured. A mesh grid 12 is disposed above the anode 11 at a predetermined interval. This mesh grid 12
It is connected to a grid wiring provided on the substrate 3 by a conductive adhesive. When the conductive adhesive is formed by a printing method, the conductive adhesive is also printed on the terminals 5.

(2) Manufacturing process of front plate 20 (see FIG. 1) A wiring pattern 21, a front plate side terminal 22, and a light transmitting plate are provided on the inner surface of front plate 20 made of glass or the like having a light transmitting property. The anode conductor 23 is formed. These are formed of an Al thin film by a photolithographic technique. The wiring pattern 21 has a width of about 30 μm, and the anode conductor 23 has 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 employed for applying the phosphor. A mesh grid 26 is disposed above the anode 25 at a predetermined interval. This mesh grid 26
It is connected to a grid wiring provided on the front plate 20 by a conductive adhesive. When the conductive adhesive for the mesh grid is formed by the screen printing method, the conductive adhesive is also applied to the terminals 22.

(3) Manufacturing Process of Spacer Frame 60 (See FIG. 2) The pair of cathode supports 61 are connected to each other at one end by a connection bar 62. A frame member 63 is provided between the other ends of the cathode supports 61. Each cathode support 61 is provided on the frame member 63.
And the external terminal 50 are provided.

The filament-shaped cathode 30 is welded and fixed between the cathode supports 61, 61 while applying a predetermined tension.

(4) Assembly / imposition process (FIGS. 1 and 2)
The spacer frame 60 is positioned on the anode substrate 2, and the corners 53 of the external terminals 50 are brought into contact with the substrate-side terminals 5. It should be noted that a fusion terminal paste or an intermediate paste is applied to the substrate-side terminals 5 in advance.

On the spacer frame 60, a frame-shaped side plate 40 formed by bonding four glass plates into a frame shape is placed. Further, the front plate 20 is positioned and placed on the side plate 40, and the front end 54 of the second portion 52 of the external terminal 50 is brought into contact with the front plate terminal 22. At this time, the second
The dimensions, shape, and the like are set so that the corners 53 and the front-side terminals 22 and the front-side terminal 22 are securely in contact with each other when the portion 52 is slightly bent. In addition, a conductive paste may be applied to the front plate side terminals 22 in advance.

The anode substrate 2, side plate 40, and front plate 20 assembled as described above are heated to about 450 ° C. in a CO ₂ gas atmosphere while being pressed from above and below using appropriate jigs. And seal them together.

According to the dual emission type fluorescent display tube 1 of the present embodiment having the above configuration, the anode 11 on the anode substrate 2 side and the front plate 2
The anode 25 on the 0 side is commonly connected by a common external terminal 50 and is drawn out of the envelope. Therefore, at the time of driving, a driving signal is simultaneously supplied to the anode 11 on the anode substrate 2 side and the anode 25 on the front plate 20 side.
In order to make the desired display on the anodes 11 and 25,
5 is driven dynamically in a series of cycles. That is, a drive signal is given to the external terminal 50 in a predetermined cycle, the mesh grids 12 and 26 corresponding to the respective anodes are independently driven, and the respective anodes 11 and 25 are selectively driven to emit light. In this display tube, the light emission display by the anodes 11 and 25 is observed through the front plate 20.

According to the dual emission type fluorescent display tube 1 of the present embodiment having the above configuration, the terminal 5 connected to the anode 11 on the anode substrate 2 side and the terminal 2 connected to the anode 25 on the front plate 20 side.
2 are connected in common by a common external terminal 50 and are drawn out of the envelope. Therefore, the number of external terminals arranged outside the envelope can be halved compared to the structure described in the related art, that is, the structure in which the terminal on the anode substrate side and the terminal on the front plate side are independently pulled out. Was. Therefore, it is not necessary to reduce the arrangement pitch of the external terminals, and the size of the envelope can be made a standard size suitable for the display area. Also, unlike conventional dual-sided fluorescent display tubes,
Since the external terminals have only one shape and it is not necessary to prepare a plurality of types of external terminals having different shapes, technical difficulties in the pressing step and the assembling step have been solved. As described above, according to this example, in the double-sided emission fluorescent display tube having the envelope configured by combining the front plate, the substrate, and the side plate, the types and number of external terminals are reduced, and the outer shape of the envelope is reduced. It was possible to make it more compact than before.

According to the example described above, the spacer frame 60 is sandwiched between the anode substrate 2 and the side plate 40.
It may be configured to be sandwiched between the front plate 20 and the side plate 40. Further, the dual emission type fluorescent display tube described in the above example is of a type in which the two light emitting display portions are observed from the side of the front plate 20 of the envelope. The present invention is also applicable to a double-sided fluorescent display tube of a type in which each light-emitting display section is observed from both sides of the envelope.
That is, in FIG. 1, the anode on the anode substrate 2 side is
With the same structure as the anode on the 0 side, the anode on the anode substrate 2 side is observed from the outside of the anode substrate 2 through the anode substrate 2,
The anode on the front plate 20 side is connected to the front plate 20 from outside the front plate 20.
The present invention can be applied to a dual emission type fluorescent display tube having such a structure.

[0034]

According to the dual emission fluorescent display tube of the present invention, the terminal connected to the light emitting display unit on the substrate side and the terminal connected to the light emitting display unit on the front plate side are connected by a common external terminal. Connected in common and pulled out of the envelope. Therefore, according to the present invention, the following effects can be obtained.

(1) Since the light emitting display section on the substrate side and the light emitting display section on the front plate side can be connected in the envelope, the number of external terminals can be greatly reduced as compared with the conventional case.

(2) According to (1), it is not necessary to increase the size of the envelope irrespective of the display area, and the size of the envelope can be reduced as compared with the conventional case.

(3) When the number of external terminals is large as in the prior art, it is necessary to reduce the pitch of the external terminals in order to reduce the size of the envelope. However, (1) eliminates the need. In addition, an increase in manufacturing costs was suppressed.

(4) Since only one type of external terminal is required, the adjustment of the mold for molding the external terminal is facilitated, and the positioning of the external terminal and the terminal in the envelope in the manufacturing process is facilitated. became.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a dual emission fluorescent display tube which is an example of an embodiment of the present invention.

FIG. 2 is a plan view of a substrate and a spacer frame in a manufacturing process of the dual emission fluorescent display tube which is an example of the embodiment of the present invention.

FIG. 3A is a cross-sectional view of a conventional double-sided fluorescent display tube. (B) is a side view of a conventional external terminal.
(C) is a side view of a conventional external terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Double-sided fluorescent display tube 2 Anode substrate 4, 21 Wiring pattern 5 Substrate side terminal 7 Insulating layer 9, 23 Anode conductor 10, 24 Phosphor layer 12, 26 Mesh grid as control electrode 20 Front plate 22 Front Face plate side terminal 30 Cathode 40 Side plate 50 External terminal 51 First part 52 Second part 53 Corner 54 End

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazushige Noguchi 629 Oshiba, Mobara City, Chiba Pref. Futaba Electronics Corporation (56) References JP-A-54-11661 (JP, A) 44001 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01J 31/15

Claims (6)

(57) [Claims] 1. An enclosure having a frame-shaped side plate sealed between a substrate and a front plate facing each other, and an inner surface of the substrate is connected to the substrate-side light-emitting display unit and the substrate-side light-emitting display unit. A double-sided fluorescent display tube having a substrate-side terminal, and having a front-panel-side light-emitting display portion and a front-panel-side terminal connected to the front-panel-side light-emitting display portion on the inner surface of the front plate. Or a plurality of external terminals that are sandwiched and sealed between one of the front plates and the side plate, and that are in contact with the substrate-side terminals and the front-plate-side terminals inside the envelope. Double-sided fluorescent display tube. 2. The external terminal according to claim 1, further comprising: a first portion sandwiched and sealed between one of the substrate or the front plate and the side plate, and a predetermined portion relative to the first portion in the envelope. A second portion continuously formed at an angle of the second portion, wherein a corner of the first portion and the second portion is connected to one of the substrate-side terminal or the front plate-side terminal, and the second portion 2. A double-sided fluorescent display tube according to claim 1, wherein a tip of said fluorescent lamp is connected to the other of said substrate side terminal and said front plate side terminal. 3. The dual emission fluorescent display tube according to claim 2, wherein said second portion is formed in a shape having a spring property. 4. A cathode for emitting electrons, a substrate-side control electrode for controlling electrons emitted from the cathode to project on the substrate-side light-emitting display section, and the cathode inside the envelope. And a front panel-side control electrode for controlling electrons emitted from the substrate and projecting the front panel-side light-emitting display section onto the front panel-side light-emitting display section, and driving the external terminals in a predetermined cycle and at the same time as the substrate in synchronization with the cycle. 2. The double-sided fluorescent display tube according to claim 1, wherein the substrate-side control electrode and the front-plate-side control electrode are driven to emit light by applying a selection signal to the side-control electrode and the front-plate-side control electrode. . 5. An enclosure in which a frame-shaped side plate is sealed between a substrate and a front plate facing each other, wherein a wiring pattern and a substrate-side terminal connected to the wiring pattern are provided on an inner surface of the substrate. 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 substrate-side control provided at a predetermined distance from the phosphor layer An electrode, and a wiring pattern on the inner surface of the front plate, a front plate side terminal connected to the wiring pattern, a translucent anode conductor connected to the wiring pattern, and a fluorescent light provided on the anode conductor. It has a body layer and a front plate side control electrode provided at a predetermined distance from the phosphor layer, and is configured to observe light emission of each of the phosphor layers on the substrate and the front plate through the front plate. Double-sided emission type In the fluorescent display tube, a plurality of external terminals that are sandwiched and sealed between one of the substrate or the front plate and the side plate and abut on the substrate side terminal and the front plate side terminal inside the envelope. A double-sided fluorescent display tube characterized by comprising: 6. An enclosure 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. A light-transmitting anode conductor connected to the wiring pattern, a phosphor layer provided on the anode conductor, and a substrate-side control electrode provided at a predetermined distance from the phosphor layer,
On the inner surface of the front plate, a wiring pattern, a front plate side terminal connected to the wiring pattern, a translucent anode conductor connected to the wiring pattern, a phosphor layer provided on the anode conductor, and the phosphor A front plate-side control electrode provided at a predetermined distance from the layer, wherein the light emission of the phosphor layer on the substrate is observed through the substrate, and the light emission of each phosphor layer on the front plate is In a dual emission fluorescent display tube configured to be viewed through a face plate, the substrate side terminal is sandwiched and sealed between one of the substrate or the front plate and the side plate, and inside the envelope. And a plurality of external terminals abutting on the front plate side terminals.