JP3298264B2 - Flat display tube and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat display tube suitable for use in a field emission type flat display device and the like, and a method of manufacturing the same.

[0002]

2. Description of the Related Art As a display device having a relatively high resolution by low voltage excitation, a field emission type flat display device (FE) using a field emission type microtip cathode is used.
D). This display device has a fine conical cathode made by fine processing facing the phosphor screen,
That is, a so-called microchip cathode is arranged, an electric field is applied to the cathode to emit electrons, and the electrons are emitted to a fluorescent screen to emit light, thereby displaying an image.

Hereinafter, referring to FIGS. 7, 8 and 9,
The structure of this field emission type flat display device and its manufacturing method will be described. As shown in FIG. 7, this display device comprises a transparent first glass panel (front glass panel) 1 and a second glass panel (back glass panel) 2
Are arranged facing each other at a predetermined small interval.
The peripheral portions of the two are bonded and hermetically sealed by a frit seal 3 to form a thin flat tube (flat container) 4 in which the field emission display mechanism is housed. This flat tube 4
The height of the airtight space inside is, for example, 0.3 mm. 1
Reference numerals 3 and 14 denote connection electrodes derived from a gate electrode, a cathode electrode, and the like, which will be described later. Note that S indicates an effective area for display.

Next, referring to FIG. 8 and FIG.
The field emission display mechanism housed in the inside will be described.
As shown in FIG. 8, a plurality of striped cathode electrodes (made of Mo, W, etc.) 5 extending in one direction (x direction) are covered on the second glass panel 2 so as to be arranged in parallel. And an insulating layer (consisting of SiO ₂ or the like) formed thereon
A plurality of stripe-shaped gate electrodes (made of Mo, W, etc.) 7 extending in a direction (y-direction) orthogonal to the direction in which the cathode electrode 5 extends through the base electrode 6 are attached so as to be arranged in parallel. It is formed.

As shown in FIG. 9, a plurality of fine through holes 8 penetrating through the gate electrode 7 and the insulating layer 6 are formed at the intersection of each cathode electrode 5 and the gate electrode 7. A conical microtip cathode 9 is formed on each of the cathode electrodes 5.

Each of the cathode electrodes 5, each of the gate electrodes 7, and the insulating layer 6 are formed by sputtering, vacuum deposition, etc., and patterned by photolithography.
The through holes 8 are formed on the second glass panel 2. Then, while rotating the second glass panel 2, the respective cathode electrodes 5, the respective gate electrodes 7, and the insulating layer 6 are obliquely vapor-deposited, sputtered, and the like from above, so as to be substantially in the respective through holes 8. A field-emission microtip cathode 9 made of, for example, tungsten W and having a conical shape is deposited.

A transparent electrode (not shown) is formed on the first glass panel 1, and a red, green and blue striped fluorescent screen 11 is formed thereon. The red, green and blue phosphor screens 11 are used for the cathode electrode 5 and the gate electrode 7.
Is formed so as to face the intersection of. A black matrix 10 is applied between the red, green and blue phosphor screens 11. In addition, for example, the red, green, and blue light-emitting phosphor screens 11 adjacent to each other in the first glass panel 1 are set as one set, and a plurality of pillars 12 are erected between the sets to form the first and second columns. The distance between the two glass panels 1 and 2 is regulated to a predetermined length. The fluorescent screen 11 is striped red,
Green and blue fluorescent screens or black and white fluorescent screens may be used.

In such a field emission type flat display device, a predetermined positive voltage is applied to the gate electrode 7 and the cathode electrode 5 and a predetermined electric field, for example, 10 ⁶ to 10 ⁸ V / cm is applied to the microtip cathode 9. By applying a certain electric field intensity, electrons are emitted from the tip of the microtip cathode 9, and the electrons are emitted by the kinetic energy given by the predetermined phosphor surface potential applied to the transparent electrode, thereby causing red, green and blue fluorescent light. The surface 11 is excited to display light emission.

After the interior of the flat tube 4 is evacuated to a high vacuum, an operation of sealing the exhaust passage is performed. This evacuation and sealing are the same as in a normal cathode ray tube, and FIG. 10 (A) or (B) (FIGS. 7 to 9 show the first and second glass panels 1, 2). As shown in the figure, the exhaust pipe 15 communicating with the flat tube 4 is erected at right angles to the second glass panel 2 or the second glass panel 2 The second is almost in line with
The through hole 2a formed in the corner of the glass panel 2 is surrounded by a circular or oval mounting opening 15a of the exhaust pipe 15 so that the mounting opening 15a is formed on the second glass panel 2 using a glass frit. Glue. Then, the inside of the flat pipe 4 is evacuated to a high vacuum through the exhaust pipe 15, and thereafter, a part of the exhaust pipe 15 is locally heated and melted and sealed. In addition, a circular groove is previously formed in the second glass panel 2, and the second
After the formation of the transparent electrode, the phosphor screen 11, and the like on the panel 2 of the above, the hole 2a may be formed by punching the portion.

[0010]

In a conventional flat display tube having such a structure, a through hole is formed at a corner of the second panel constituting the flat tube, and an exhaust pipe is formed around the through hole on the panel. Since the mounting port is glued, if the through-hole drilled in the corner of the panel in advance,
Dust accumulates in the through-hole, and after forming a part of the display mechanism on the panel and then punching out a circular groove to form a through-hole, the debris will fly and contaminate the panel. If the dust or debris is not removed by washing the panel, the flat display tube may be defective, and the panel may be damaged if a through hole is formed later. In any case, such through holes adversely affect the flat display tube. When the flat display tube is small, the second panel 2 can be made of a silicon substrate. In this case, it is easy to form an electrode and an insulating layer. It is almost impossible to form a simple through hole 2a.

In view of the above, the present invention has a pair of panels facing each other at a predetermined interval, and peripheral portions thereof are adhered and sealed by frit seals, and a part thereof is provided with an exhaust pipe communicating with the inside. In a flat display tube having a flat tube and a display mechanism sealed therein, there is no danger of dust or debris being generated at the joint between the flat tube and the exhaust pipe, and furthermore, there is a risk that the panel may be damaged. A flat display tube and a method of manufacturing the same are not proposed.

[0012]

SUMMARY OF THE INVENTION A flat display tube according to the present invention comprises a first display tube opposed to a first display tube at a predetermined interval.
And a second panel, and a peripheral portion of the first and second panels is adhered by a frit seal except for a predetermined corner of the first and second panels, and a first panel on the first panel is provided. A flat tube provided with a predetermined space near the predetermined corner of the second panel where the second panel does not face, a display mechanism sealed in the flat tube, and predetermined corners of the first and second panels. And a mounting opening which abuts a mounting surface over a predetermined space of the first panel and on the second panel so as to surround the through hole formed by the lacking portion of the frit seal. And an exhaust pipe whose end is sealed after evacuating the flat tube. The method of manufacturing a flat display tube according to the present invention includes the steps of: first and second panels facing each other at a predetermined interval except for predetermined corners of the first and second panels; Bonding the peripheral portions of the first and second panels except for the predetermined corners with a frit seal to form a flat tube in which the display mechanism is sealed; and the predetermined corners of the first and second panels. And a mounting opening of the exhaust pipe having a mounting opening that abuts a mounting surface over the predetermined space of the first panel and the second panel so as to surround the through hole formed by the lack of the frit seal. And a step of adhering to the mounting surface with a frit seal, a step of evacuating the inside of the flat tube through the exhaust pipe, and a step of sealing the end of the exhaust pipe.

[0013]

According to the flat display tube of the present invention, the peripheral portions of the first and second panels are adhered by the frit seal except for the predetermined corners of the first and second panels opposed to each other at a predetermined interval. In addition, a flat space is provided near the predetermined corners of the first and second panels on the first panel so that the second panel does not face the flat panel, and a flat tube is formed, and a display mechanism is sealed in the flat tube. The first and second panels come into contact with a mounting surface extending over a predetermined space of the first panel and a second panel so as to surround a through hole formed at a predetermined corner portion of the first and second panels and a lacking portion of the frit seal. An exhaust pipe having a fitting opening is provided, the fitting opening of the exhaust pipe is adhered to the mounting surface by a frit seal, and the end of the exhaust pipe is sealed after the flat tube is evacuated. According to the flat display tube manufacturing method of the present invention, the first
And the first and second panels except for the predetermined corners of the first and second panels so as to face each other at a predetermined interval except for the predetermined corners of the first and second panels. A peripheral portion of the panel is adhered by a frit seal to form a flat tube in which the display mechanism is enclosed, and surrounds a through hole formed at a predetermined corner portion of the first and second panels and a lack portion of the frit seal. As described above, the mounting port of the exhaust pipe having the mounting port which abuts on the predetermined space of the first panel and the mounting panel over the second panel is adhered to the mounting surface by a frit seal, and the flat pipe is inserted through the exhaust pipe. Is evacuated.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG.
An embodiment (1) applied to a field emission type flat display tube as described with reference to FIG. 9 will be described. FIG. 1A is a perspective view showing a state in which the exhaust pipe is not yet attached to the flat pipe, and FIG. 1B is a view showing a state in which the exhaust pipe is attached to the flat pipe taken along the line aa ′ in FIG. FIG. The flat display tube includes a flat tube 4 and the flat tube 4.
It comprises a display mechanism enclosed therein and an exhaust pipe 15 attached to the flat tube 4. Note that the display mechanism is the same as that described with reference to FIGS. 8 and 9, and a redundant description will be omitted.

The flat tube 4 has first and second glass panels 1 and 2 opposed to each other at a predetermined interval, and the first and second glass panels 1 and 2 except for predetermined corners of the first and second panels 1 and 2. 2
The peripheral portions of the first and second panels 1 and 2 are adhered and sealed by a sealing member 3, and the second panel 2 is located near predetermined corners of the first and second panels 1 and 2 on the first panel 1. A predetermined space 1b that does not face is provided. here,
Of the rectangular first and second panels 1 and 2, in particular, an end of a predetermined corner of the second panel 2 is cut in advance into a triangular shape (an isosceles triangular shape). The position of the second panel 2 can be distinguished.

The exhaust pipe 15 is provided at predetermined corners of the first and second panels 1 and 2 of the flat pipe 4 and at a part 3 a where the seal member 3 is missing.
{See FIG. 3 (A)} so as to surround the through hole h formed in FIG.
A mounting hole 15a having a step which abuts a mounting surface P having a step over the predetermined space 1b of the first panel 1 and the second panel 2 is provided. Sealed by. Here, the exhaust pipe 15 does not pass above the first and second panels 1 and 2 from the predetermined corners of the first and second panels 1 and 2 and does not pass through the first and second panels 1 and 2. Substantially parallel to the surface of
And extends in a direction away from the second panels 1 and 2, but may extend above the first and second panels 1 and 2, or alternatively, the first and second panels may be extended. One, two
May be extended in a direction substantially perpendicular to the plane of the above.

The cut-out portion of the second panel 2 may have a trapezoidal triangular shape, whereby the sectional area of the through hole h can be made relatively large.

Next, a method of manufacturing the flat display device will be described with reference to FIGS. 3, 8 and 9 together with FIG. In step ST-1, a transparent electrode and a fluorescent screen 11 are formed on the second panel 2 by adhesion, and in step ST-2.
Then, a peripheral glass frit seal 3 is formed on the second panel 2, but a missing portion 3 a is provided in the frit seal 3 at a predetermined corner of the second panel 2.
(A)｝. In step ST-3, the second panel 2 is used to scatter the frit 3 into the binder, for example, 39
It is calcined at a temperature of 0 ° C. to 400 ° C. for about 10 minutes.

On the other hand, in step ST-8, the cathode electrode 5, the insulating layer 6, and the gate electrode 7 are formed on the first panel 1, and the microtip cathode 9 is formed in the fine through hole 8.

On the other hand, in step ST-9, a glass tube g for preparing the exhaust pipe 15 is prepared (FIG. 3A). In step ST-10, the glass tube g is heated and one end t of the glass tube g is heated. It is closed and a step is provided in a part of it.
(B)｝. In step ST-11, the mounting opening 15a is formed by polishing the glass tube g.
(D)｝, the exhaust pipe 15 is obtained. The attachment port 15a of the exhaust pipe 15 has the step d as described above. The step d is selected to be a value obtained by adding the height of the column 12 to the thickness of the second panel 2. In step ST-12, this exhaust pipe 1
5. Apply a frit to the mounting opening 15a of Step 5, and
At -13, the exhaust pipe 15 is calcined at a temperature of, for example, 390 ° C. to 400 ° C. for about 10 minutes to scatter the frit into the binder, and the frit 1 is inserted into the mounting port 15a.
6 is completed (step ST-1).
4).

Then, in step ST-4, the first and second panels 1 and 2 are positioned and assembled by a positioning jig, and the exhaust pipe 15 is attached.
In step ST-5, these first and second panels 1,
2 and the exhaust pipe 15 are frit-sealed in an N ₂ atmosphere to obtain a flat display pipe.
In step 6, the flat display tube is heated and exhausted, and in step ST-7, the exhaust tube 15 is sealed.

In the embodiment (1) of FIG. 1 described above, the end of the predetermined corner of the second panel 2 is cut into a triangular shape.
As in the embodiment (2) shown in (1), the original triangle may be used without cutting.

Although the shape of the exhaust pipe 15 can be variously varied, as shown in FIG. 5, the width of the mounting port 15a can be made relatively large to make it a flat plate as a whole. As shown, the length of the mounting opening 15a can be made relatively long so that the mounting opening 15a can be made longer as a whole. In FIG. 5, (A) is a perspective view of the exhaust pipe 15,
(B) is a side view thereof, and (C) is a rear view thereof. or,
6A is a rear view of the exhaust pipe 15, FIG. 6B is a side view thereof, and FIG. 6C is a perspective view.

In the above embodiment, the panels 1 and 2 constituting the flat tube 4 are the first and second panels, respectively.
Depending on the display mechanism, panels 2 and 1 are
And a second panel. Further, the present invention is not limited to the above-described field emission type flat display device.

Although the first and second panels use glass, the second panel on the side where the exhaust pipe is attached does not need to be perforated, so that a silicon substrate can be used.

The exhaust pipe may also serve as a getter container.

[0027]

According to the present invention described above, there are provided first and second panels opposed to each other at a predetermined interval, and the first and second panels except for predetermined corners of the first and second panels are provided.
A flat tube in which a peripheral portion of the panel is bonded by a frit seal, and a predetermined space is provided near a predetermined corner of the first and second panels on the first panel so that the second panel does not face the flat tube; A display mechanism enclosed in the flat tube and a predetermined space in the first panel and a second space surrounding the through hole formed in predetermined corners of the first and second panels and a lacking portion of the frit seal. A mounting surface that abuts the mounting surface over the panel, the mounting surface is bonded to the mounting surface by a frit seal, and the exhaust pipe has an end sealed after evacuation of the flat tube. ,
There is no need to drill a through hole in the first or second panel, and there is no danger of dust or debris being generated at the joint between the flat tube and the exhaust pipe, and there is no risk of damaging the panel. Even if it is thin, it is possible to obtain a flat display tube in which the attachment strength of the exhaust pipe is high and the exhaust pipe does not hinder the wiring section even when the wiring section is provided at the end of the flat pipe. According to the present invention described above, the first and second panels are opposed to each other at a predetermined interval except for the predetermined corners of the first and second panels at the predetermined corners of the first and second panels. Bonding the peripheral portions of the first and second panels with a frit seal except for forming a flat tube in which the display mechanism is sealed, and a predetermined corner portion of the first and second panels and the frit seal. A mounting surface of the exhaust pipe having a mounting opening which abuts a mounting surface over a predetermined space of the first panel and on the second panel so as to surround the through hole formed by the lack of the mounting surface; And a step of evacuating the inside of the flat tube through the exhaust pipe, and a step of sealing the end of the exhaust pipe. It becomes unnecessary, and flat tubes and exhaust pipes There is no danger of dust or debris being generated at the joint, there is no danger of the panel being damaged, and even if the flat tube is thin, the mounting strength of the exhaust pipe is high, and a wiring portion is provided at the end of the flat tube. Even in this case, it is possible to obtain a flat display tube manufacturing method capable of manufacturing a flat display tube in which the exhaust pipe does not interfere with the wiring section.

[Brief description of the drawings]

FIG. 1 is a perspective view and a sectional view of an embodiment (1) of the present invention.

FIG. 2 is a flowchart showing a manufacturing method of the flat display device of the embodiment (1).

FIG. 3 is a process diagram showing a method for manufacturing the first glass panel and the exhaust pipe.

FIG. 4 is a perspective view of an embodiment (2) of the present invention.

FIG. 5 is a perspective view, a side view, and a rear view showing another example of the exhaust pipe.

FIG. 6 is a rear view, a side view, and a perspective view showing still another example of the exhaust pipe.

FIG. 7 is a perspective view of a conventional example.

FIG. 8 is an exploded perspective view of the conventional example.

FIG. 9 is a perspective view of a part of the conventional example.

FIG. 10 is a perspective view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st glass panel 2 2nd glass panel 3 Frit seal 4 Flat tube 15 Exhaust pipe 15a Mounting port 16 Frit seal

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H01J 31/12 H01J 9/26 H01J 9/385 H01J 11/02 H01J 61/30

Claims (4)

(57) [Claims] A first panel and a second panel which are opposed to each other at a predetermined interval, and a peripheral portion of the first and second panels is frit except for predetermined corners of the first and second panels. A flat tube adhered by a seal and provided with a predetermined space on the first panel near predetermined corners of the first and second panels so that the second panel does not face the flat tube; A sealed display mechanism, and a predetermined space of the first panel and the second space surrounding the through hole formed at the predetermined corner of the first and second panels and the lacking portion of the frit seal. An exhaust pipe provided with a mounting port which abuts a mounting surface over the second panel, the mounting port being adhered to the mounting surface by a frit seal, and having an end sealed after evacuation of the flat tube. It is special to have Flat display tube according to. 2. The flat display tube according to claim 1, wherein an end of a predetermined corner of the second panel is cut in advance. 3. The method according to claim 1, wherein the first and second panels are formed by the first and second panels.
The first panel and the second panel are opposed to each other at a predetermined interval except for a predetermined corner of the first panel.
Bonding a peripheral portion of the second panel with a frit seal to form a flat tube enclosing the display mechanism; and a predetermined corner portion of the first and second panels and a lack portion of the frit seal. The mounting port of the exhaust pipe having a mounting port that abuts on a predetermined space of the first panel and a mounting surface over the second panel so as to surround the through hole formed by the mounting surface. A method of manufacturing a flat display tube, comprising the steps of: adhering to a flat tube with a frit seal; evacuating the flat tube through the exhaust tube; and sealing an end of the exhaust tube. 4. The method according to claim 3, wherein an end of a predetermined corner of the second panel is cut in advance.