KR100306567B1 - Both-side emission type fluorescent display device - Google Patents

Abstract

(Problem) Reduce the external terminal of the double-sided fluorescent display tube and reduce the external atmosphere.

(Resolution) The double-sided fluorescent display tube 1 has an enclosure consisting of a positive electrode substrate 2, a front plate 20 and a side plate 40. On the positive electrode substrate 2 is a positive electrode 11. On the front plate 20 there is an anode 25. Within the envelope is a cathode 30 and grids 12, 26. The positive anode is observed on the faceplate side. The external terminal 50 has a first portion 51 and a second portion 52 shaped into a substantially "u" shape. The first portion 51 is sandwiched by a sealing portion of the envelope, and the second portion 52 is housed in the envelope in the envelope. Each part 53 is fixed to the board | substrate side terminal 5, and the front-end | tip 54 of the 2nd part 52 abuts on the front plate side terminal 22. As shown in FIG. At the time of driving, a drive signal is applied to the external terminal 50 at predetermined cycles, and the grids 12 and 26 corresponding to each anode are independently driven, and each of the anodes 11 and 25 is selectively driven to emit light. . Since both anodes were connected in common, the number of external terminals was reduced, and the external appearance of the envelope was made smaller than before.

Description

Double Sided Fluorescent Display Tube {BOTH-SIDE EMISSION TYPE FLUORESCENT DISPLAY DEVICE}

(Technical field to which the invention belongs)

The present invention relates to an improvement of a double-sided fluorescent display tube in which light-emitting displays are performed on both sides of the envelope.

(Conventional technology)

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 a front plate side facing the envelope. The double-sided fluorescence display tube is of the type of observing two light emitting displays on the front plate side of the enclosure, or on the front side of the substrate side and at the same time observing the light emitting display portions on the substrate side. Types are known.

A cross-sectional view of the double-sided fluorescent display tube 100 is shown in Fig. 3A. The double-sided fluorescent display tube 100 has a box-shaped envelope formed by assembling a glass anode plate 101, a front plate 102, and a side plate 103. A light emitting display portion (not shown) is formed on the inner surface of the positive electrode substrate 101. Light emission of the light emitting display portion on the positive electrode substrate 101 side is observed through the front plate 102 from the outside of the front plate 102. A light emitting display portion (not shown) is formed on the inner surface of the transmissive front plate 102. Light emission of the light emitting display portion on the front plate 102 side is observed through the front plate 102 from the outside of the front plate 102.

On the inner surface of the positive electrode substrate 101 is a substrate side terminal 104 connected to the light emitting display portion on the positive electrode substrate 101 side. On the inner surface of the front plate 102 is a front plate side terminal 105 connected to the light emitting display unit on the front plate 102 side. A plurality of external terminals 106 and 107 are provided at the board side terminal 104 and the front plate side terminal 105. Among the external terminals, the external terminal 106 connected to the board side terminal 104 is bent downward when the substrate 101 is lowered, as shown in FIG. The external terminal 107 connected to the front plate side terminal 105 is bent so as to be upwardly at an approximately right angle as shown in FIG. In addition, in Fig. 3A, two types of external terminals 106 and 107 having different shapes are arranged in a direction perpendicular to the ground, and partly overlapped with each other.

The external terminals 106 and 107 are fixed to the sealing portion of the envelope, and are hermetically penetrated through the sealing portion to be led out of the envelope.

(Problem that invention tries to solve)

As described above, in the conventional double-sided fluorescence display tube, since each terminal portion on the substrate side and the front plate side is connected to a separate external terminal having a different structure, the external lead is external. There were problems that two kinds were prepared and the number was many more. That is, in the above-described structure, the external terminal is connected to each of the substrate side terminals 104 on the positive electrode substrate 101 side and each of the front plate side terminals 105 on the front plate 102 side, and drawn out to the outside of the envelope. Therefore, two types of external terminals are required depending on the position of the terminal, and the number of the external terminals is required for the total number of the two types of terminals 104 and 105.

As described above, in the conventional double-sided fluorescent display tube, since the number of external terminals increases, it is necessary to increase the size of the envelope in spite of the display area. If the dimensions of the envelope are made to be a standard size suitable for the display area, the excretion pitch of a large number of external terminals must be reduced, which causes difficulties in manufacturing technology and increases the manufacturing cost.

In the conventional double-sided fluorescence display tube, since external terminals of different types were mixed, it was difficult to adjust the mold in the pressing step, and it was difficult to align with each terminal in the envelope in the assembling step.

An object of the present invention is to reduce the type and number of external terminals in a double-side light emitting fluorescent display tube having an envelope formed by combining a front plate, a substrate and a side plate, and to reduce the external appearance of the envelope.

1 is a cross-sectional view of a double-sided fluorescent display tube as an example of an embodiment of the present invention.

Fig. 2 is a plan view of a substrate and a spacer frame in the process of manufacturing a double-sided fluorescent display tube which is one example of an embodiment of the present invention.

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

(Explanation of symbols for the main parts of the drawing)

DESCRIPTION OF SYMBOLS 1 Double-sided fluorescence display tube 2 Positive substrate as substrate

4, 21: wiring pattern 5: board side terminal

7: insulation layer 9, 23: anode conductor

10, 24: phosphor layer

12, 26: mesh grid as control electrode

20: Front panel 22: Front panel side terminal

30: cathode 40: side plate

50: external terminal 51: first part

52: second part 53: each part

54: tip

(Means to solve the task)

The double-sided fluorescence display tube according to claim 1 has an envelope which encloses a frame-shaped side plate between a substrate facing each other and a front plate, and is connected to a substrate side light emitting display portion and the substrate side light emitting display portion on an inner surface of the substrate. And a front panel side terminal connected to the front plate side light emitting display unit and a front plate side terminal connected to the front plate side light emitting display unit. And a plurality of external terminals sandwiched between the side plates and held in contact with the substrate side terminals and the front plate side terminals in the enclosure.

A double-sided fluorescence display tube according to claim 2 is a double-sided fluorescence display tube according to claim 1, wherein the external terminal is supported and sealed between one side of the substrate or one of the front plate and the side plate. Part and a second part which is continuously formed at a predetermined angle with respect to the first part in the envelope, and each part of the first part and the second part is formed of the board-side terminal or the front plate-side terminal. It is connected to one side, and the front-end | tip of the said 2nd part was connected to the other side of the said board | substrate side terminal or the said front plate side terminal, It is characterized by the above-mentioned.

A double-sided fluorescence display tube according to claim 3 is characterized in that the second portion is molded into a shape having a spring property in the double-sided fluorescence display tube according to claim 2.

The double-sided fluorescent display tube according to claim 4 is a double-sided fluorescent display tube according to claim 1, wherein the inside of the envelope is a cathode for emitting electrons, and the electrons emitted from the cathode are controlled to emit light on the substrate side. A substrate side control electrode which impinges on the display unit and a front plate side control electrode which controls the electrons emitted from the cathode and impinges on the front plate side light emitting display unit are provided to drive the external terminal in a predetermined cycle and to synchronize the cycle. The substrate-side control electrode and the front plate-side control electrode are configured to emit light by applying a selection signal to the substrate-side control electrode and the front plate-side control electrode at timing.

The double-sided fluorescence display tube according to claim 5 has an envelope which encloses a frame-shaped side plate between the substrate and the front plate facing each other, and a substrate side terminal connected to the wiring pattern and the wiring pattern on the inner surface of the substrate. And an insulating layer covering the wiring pattern, an anode conductor disposed on the insulation layer and connected to the wiring pattern, a phosphor layer disposed on the anode conductor, and a substrate side control electrode disposed at a predetermined distance from the phosphor layer. An inner surface of the front plate includes a wiring pattern, a front plate side terminal connected to the wiring pattern, a transmissive anode conductor connected to the wiring pattern, a phosphor layer provided on the anode conductor, and a front surface spaced a predetermined distance from the phosphor layer. It has a plate-side control electrode and is configured to observe the light emission of each phosphor layer on the substrate and the front plate through the front plate. A double-sided light emitting fluorescent tube having a light emitting tube, which is sandwiched between one of the substrate and the front plate and the side plate, and is sealed to the substrate side terminal and the front plate side terminal in the enclosure. It is characterized by including a plurality of external terminals in contact.

The double-sided fluorescent display tube according to claim 6 has an envelope which encloses a frame-shaped side plate between the substrate and the front panel facing each other, and a substrate side terminal connected to the wiring pattern and the wiring pattern on the inner surface of the substrate. And a light-transmissive anode conductor connected to the wiring pattern, a phosphor layer provided on the anode conductor, a phosphor layer provided at a predetermined distance apart from the phosphor layer, and a substrate side control electrode provided at a predetermined distance apart from the phosphor layer. An inner surface of the front plate includes a wiring pattern, a front plate side terminal connected to the wiring pattern, a transmissive anode conductor connected to the wiring pattern, a phosphor layer provided on the anode conductor, and a front surface spaced a predetermined distance away from the phosphor layer. Having a plate-side control electrode, light emission of the phosphor layer on the substrate is observed through the substrate, and at the front plate In the double-sided fluorescent display tube configured to be observed through the front plate, light emission of each phosphor layer of the substrate is sandwiched between one side of the substrate or the front plate and the side plate, and is sealed. It is characterized by including a plurality of external terminals in contact with the substrate side terminal and the front plate side terminal therein.

Embodiment of the Invention

A double-sided 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, on the glass-made positive electrode substrate 2, there is a wiring pattern 4 and a substrate side terminal 5 of an Al thin film. The wiring pattern 4 and the board | substrate side terminal 5 are connected. On the wiring pattern 4, there is a black insulating layer 7 having a through hole 6. An anode conductor 9 is provided on the through hole 6 of the insulating layer 7 and is connected to the wiring pattern 4 through a conductive material filled in the through hole 6. The phosphor layer 10 is provided on the anode conductor 9, and an anode 11 as a light emitting display portion is formed. Above the anode 11, mesh grids 12 as positive electrode substrate control electrodes are arranged at predetermined intervals.

On the inner surface of the front plate 20 made of glass or the like having light transmittance, there is a wiring pattern 21 and a front plate side terminal 22. The wiring pattern 21 and the front plate side terminal 22 are connected. In addition, an anode 25 serving as a light emitting display portion including a light-transmitting anode conductor 23 connected to the wiring pattern 21 and a phosphor layer 24 provided on the anode conductor 23 is formed on the inner surface of the front plate 20. Consists of. Above the anode 25 (below in the figure), mesh grids 26 as front plate side control electrodes are arranged at predetermined intervals. In the envelope, a filament-shaped cathode 30 is provided between the mesh grids 12 and 26 tautly.

A plurality of external terminals 50 are provided on the board side terminal 5 and the front plate side terminal 22. The external terminal 50 is a member formed by folding and bending a metal member such as 42-6 alloy (42% Ni, 6% Cr, remaining Fe, etc.) by press molding. The external terminal 50 has a long, thin, flat plate-shaped first portion 51, and a second portion 52 formed by folding and bending the first portion 51 at a predetermined angle. The 2nd part 52 is shape | molded in substantially "u" shape, and has spring property.

The first portion 51 is sandwiched between the positive electrode substrate 2 and the side plate 40, and is sealed. The second portion 52 is disposed between the positive electrode substrate 2 and the front plate 20 in the enclosure. It is stored in the 휜 state. Each part 53 of the 1st part 51 and the 2nd part 52 abuts on the board | substrate side terminal 5 by the spring property of the 2nd part 52, and simultaneously mixes frit glass with the electrically conductive paste. It is reliably fixed and connected by the fusion | melting terminal paste, the intermediate adhesion paste which is an electrically conductive paste, etc. By the spring property of the second part 52, the front end 54 of the second part 52 abuts on the front plate side terminal 22, thereby obtaining a reliable electrical connection. Not only the tip 54 is brought into contact with the terminal 22 but also bonded with the conductive fusion terminal paste or the conductive intermediate bonding paste, more reliable electrical connection may be obtained.

The positive electrode substrate 2 and the front plate 20 are sealed by the sealing material 8 with the side plate 40 interposed therebetween, and a box-shaped envelope is formed. The external terminal 50 is hermetically penetrated through the sealing portion on the positive electrode substrate 2 side of the envelope and is drawn out of the envelope.

Next, the manufacturing process of the double-sided fluorescent display tube 1 will be described.

(1) Manufacturing process of the positive electrode substrate 2 (see FIG. 1)

(1) A wiring pattern (4) and a board side terminal (5) are formed of an Al thin film on a glass anode substrate (2) by photolithography.

(2) A black insulating layer 7 having a through hole 6 is formed on the wiring pattern 4 by a printing method. The insulating layer 7 serves as a black background for improving the contrast of the light emitting display. Moreover, the sealing material 8 is printed around the board | substrate 3 with formation of the insulating layer 7. These are fired and firmly attached to the base.

(3) A positive conductor 9 of 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 through the through hole 6. The positive electrode conductor 9 is also fired and firmly attached to the base.

(4) The phosphor layer 10 is formed on the anode conductor 9 by a printing method, and the anode layer 11 is formed by firing and fixing it.

(5) The mesh grid 12 is arranged in a predetermined interval above the anode 11. This mesh grid 12 is connected to the wiring for grid provided on the said board | substrate 3 with a conductive adhesive material. When the conductive adhesive is formed by the printing method, the conductive adhesive is also printed on the terminal 5.

(2) Manufacturing process of the front plate 20 (see FIG. 1)

(1) The wiring pattern 21, the front plate side terminal 22, and the anode conductor 23 having light transparency are formed on the inner surface of the front plate 20 made of transparent glass. These are formed into an Al thin film by the method of photolithography. The wiring pattern 21 has a width of about 30 μm, and the anode conductor 23 has a mesh shape to transmit light.

(2) A phosphor layer 24 is formed on the anode conductor 23, and the anode 25 is formed. A printing method or an electrodeposition method can be adopted for deposition of the phosphor.

(3) The mesh grid 26 is arranged in a predetermined interval above the anode 25. As shown in FIG. The mesh grid 26 is connected to the wiring for grid provided on the front plate 20 with a conductive adhesive. When the conductive adhesive for mesh grid is formed by the screen printing method, a conductive adhesive is also deposited on the terminal 22.

(3) Manufacturing process of spacer frame 60 (refer FIG. 2)

① A pair of cathode support bodies 61 and 61 are connected between each one end part by the connection bar 62. As shown in FIG. The frame member 63 is provided between the other end portions of each cathode support 61. Each cathode support 61 and the external terminal 50 are provided in the frame member 63.

(2) Welding fixing the filamentary cathode 30 between the cathode supports 61 and 61 in a state in which a predetermined tension is applied.

(4) Assembly and surface attachment process (refer FIG. 1 and FIG. 2)

The spacer frame 60 is positioned on the positive electrode substrate 2, and each portion 53 of the external terminal 50 is brought into contact with the terminal 5 on the substrate side. In addition, the board terminal 5 is coated with a fusion terminal paste or an intermediate bonding paste in advance.

On the spacer frame 60, a frame-shaped side plate 40 in which four glass plates are molded in a mold shape is mounted. Further, the front plate 20 is positioned and positioned 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 side terminal 22. . In this case, the second portion 52 is slightly bent, so that the dimensions, the shape, and the like are set so that the corner portions 53, the board side terminal 5 and the front end 54 and the front plate side terminal 22 are securely in contact with each other. Put it. Moreover, you may apply | coat the electroconductive intermediate pasting paste to the front plate side terminal 22 previously.

As described above, the positive electrode substrate 2, the side plate 40, and the front plate 20, which are assembled by positioning each other, are pressed at about 450 ° C. in a CO ₂ gas atmosphere by pressing them from above and below using an appropriate jig. Heat, seal each other.

According to the double-sided fluorescence display tube 1 of this example having the above structure, the external terminal 50 is connected to the positive electrode 11 on the positive electrode substrate 2 side and the positive electrode 25 on the front plate 20 side. It connects in common and draws out to the exterior of an envelope. Therefore, at the time of driving, since the driving signal is simultaneously applied to the anode 11 on the positive electrode substrate 2 side and the anode 25 on the front plate 20 side, desired display is performed on each of the anodes 11 and 25. To do this, each of the anodes 11 and 25 is dynamically driven in a series of cycles. That is, the drive signal is applied to the external terminal 50 at a predetermined cycle, and the mesh grids 12 and 26 corresponding to each anode are independently driven, and each of the anodes 11 and 25 is selectively emitted. Drive it. In addition, in this display tube, light emission displays by the anodes 11 and 25 are observed through the front plate 20.

According to the double-sided fluorescence display tube 1 of this example having the above structure, the terminal 5 connected to the anode 11 on the positive electrode substrate 2 side and the positive electrode 25 on the front plate 20 side are provided. The connected terminal 22 is connected in common by the common external terminal 50, and is led out to the outside of the envelope. For this reason, compared with the structure described by the prior art, that is, the structure in which the terminal on the positive electrode side and the terminal on the front plate side are taken out independently, the number of external terminals arranged on the outside of the envelope can be halved. Therefore, it is not necessary to reduce the arrangement pitch of the external terminals, and the size of the envelope can be a standard size suitable for the display area. Unlike the conventional double-sided fluorescent display tube, there is no need to prepare one type of external terminal and a plurality of types of external terminals having different shapes, thus eliminating technical difficulties in the pressing process and the assembling process. As described above, according to the present example, the type and number of external terminals can be reduced and the external appearance of the envelope can be made smaller than in the conventional double-sided fluorescent display tube having the envelope formed by combining the front plate, the substrate and the side plate. there was.

According to the example described above, although the spacer frame 60 was sandwiched between the positive electrode substrate 2 and the side plate 40, the spacer frame 60 may be sandwiched between the front plate 20 and the side plate 40. The double-sided fluorescent display tube described in the above example was of the type of observing two light emitting display portions from the side of the front plate 20 of the envelope, but the structure of the external terminal of the present invention is different from both sides of the envelope. The present invention is also applicable to a double-sided fluorescent display tube of the type for observing the light emitting display units, respectively.

That is, in FIG. 1, when the positive electrode on the positive electrode substrate 2 side has the same structure as the positive electrode on the front plate 20 side, the positive electrode on the positive electrode substrate 2 side is the positive electrode substrate 2 on the outside of the positive electrode substrate 2. Is observed through the front plate 20 from the outside of the front plate 20, but the double-sided fluorescence display tube having such a structure is also seen. The invention can be applied.

According to the double-sided fluorescent display tube of the present invention, the terminal connected to the light emitting display portion on the substrate side and the terminal connected to the light emitting display portion on the front plate side are commonly connected by a common external terminal and drawn out to the outside of the envelope. Doing. Therefore, according to this invention, the following effects are acquired.

(1) Since the light emitting display portion on the substrate side and the light emitting display portion on the front plate side can be connected in the enclosure, the number of external terminals can be significantly reduced than before.

(2) By (1), it is not necessary to enlarge the envelope regardless of the display area, and the dimension of the envelope can be made smaller than before.

(3) As in the past, when the number of external terminals is large, it is necessary to reduce the pitch of the external terminals because the size of the external atmosphere is reduced. However, the necessity is eliminated by (1), and the rise in manufacturing cost is suppressed. .

(4) Since only one type of external terminal is provided, adjustment of the mold for molding the external terminal becomes easy, and alignment of the external terminal with the terminal in the enclosure is facilitated in the manufacturing process.

Claims (6)

An envelope having a frame-shaped side plate sealed between the substrate and the front plate facing each other, the inner surface of the substrate having a substrate side light emitting display portion and a substrate side terminal connected to the substrate side light emitting display portion; In a double-sided fluorescence display tube having an inner surface side light emitting display portion and a front plate side terminal connected to the front plate side light emitting display portion, And a plurality of external terminals which are sandwiched and sealed between one of the substrate or the front plate and the side plate and are in contact with the substrate side terminal and the front plate side terminal in the enclosure. Double-sided fluorescent display tube. The said external terminal is a 1st part clamped and sealed between one of the said board | substrate or the said front plate, and the said side plate, and a predetermined angle with respect to the said 1st part in the said enclosure. And a second portion which is continuously formed, and each 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 tip of the second portion is connected to the substrate-side terminal or the A double-sided fluorescent display tube, connected to the other side of the front panel side terminal. The double-sided fluorescent display tube according to claim 2, wherein the second portion is molded into a shape having a spring property. 2. The apparatus of claim 1, wherein an inside of the envelope controls a cathode for emitting electrons, a substrate-side control electrode for controlling electrons emitted from the cathode to impinge on the substrate-side light emitting display, and electrons emitted from the cathode. And a front plate side control electrode for impinging on the front plate side light emitting display unit to drive the external terminal in a predetermined cycle and to select a selection signal to the substrate side control electrode and the front plate side control electrode at a timing synchronized with the cycle. And a light emitting drive of the substrate side control electrode and the front plate side control electrode. An envelope having a frame-shaped side plate enclosed between the substrate and the front plate facing each other, and an inner surface of the substrate includes a wiring pattern, a substrate side terminal connected to the wiring pattern, and an insulating layer covering the wiring pattern and the insulation An anode conductor provided on the layer and connected to the wiring pattern, a phosphor layer disposed on the anode conductor, and a substrate side control electrode disposed at a predetermined distance from the phosphor layer, and an inner surface of the front plate having a wiring pattern and the wiring; A front plate side terminal connected to the pattern, a transparent anode conductor connected to the wiring pattern, a phosphor layer provided on the anode conductor, and a front plate side control electrode provided at a predetermined distance from the phosphor layer; A double-sided light emitting fluorescent display tube configured to observe light emission of each phosphor layer in a plate through the front plate, And a plurality of external terminals which are sandwiched and sealed between one of the substrate or the front plate and the side plate and contact the substrate side terminal and the front plate side terminal in the enclosure. Double-sided fluorescent display tube. An envelope having a frame-shaped side plate sealed between the substrate and the front plate facing each other, wherein the inner surface of the substrate has a wiring pattern, a substrate side terminal connected to the wiring pattern, and a light-transmissive anode conductor connected to the wiring pattern. And a phosphor layer provided on the anode conductor and a substrate side control electrode spaced apart from the phosphor layer by a predetermined distance. An inner surface of the front plate includes a wiring pattern and a front plate side terminal connected to the wiring pattern and the wiring pattern. A light-transmitting anode conductor, a phosphor layer provided on the anode conductor, and a front plate side control electrode provided at a predetermined interval away from the phosphor layer, and light emission of the phosphor layer on the substrate is observed through the substrate; The light emission of each phosphor layer on the front plate is a double-sided fluorescent display tube configured to be observed through the front plate. book, And a plurality of external terminals which are sandwiched and sealed between one of the substrate or the front plate and the side plate, and which contact the substrate side terminal and the front plate side terminal in the enclosure. Double-sided fluorescent display tube.