JPH02288132A - Flat type display device - Google Patents

Abstract

PURPOSE:To reduce the cost, accomplish automation, secure high precision, and enhance the yield by fixing a plurality of terminal to control an electrode structure to a rear vessel fitted to a front vessel furnished with a fluorescent substance surface. CONSTITUTION:A plurality of terminals 4 to control an electrode structure 6 are furnished fixed vertically to a rear vessel 2 arranged in parallel with the fluorescent substance surface 7 of a front glass vessel 8. Because sealing is made locally and quickly, the electrode structure 6 is held at room temp. as it is. Thereby the electrode structure 6 is free from oxidation due to heat generated at the time of sealing, each electrode is free from dislocation due to thermal expansion/contraction, and the front glass vessel 8 is free from crack initiation. Thus a flat type display device whereby cost-down, automation, high yield, and high reliability are attained can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a flat display device for video equipment.

BACKGROUND OF THE INVENTION In recent years, an attempt has been made to create a device that can display color television images on a flat screen using electron beams. The electron beam is vertically deflected to display a plurality of lines, and the electron beam is further divided into a plurality of sections horizontally, and phosphors such as R, G, and B are sequentially emitted in each section, and the R, G, and B phosphors are sequentially emitted in each section. Some devices display a television image as a whole by controlling the amount of electron beam irradiation on phosphors such as G and B using color video signals. An example of the above-mentioned conventional flat panel display device will be described below with reference to the drawings.

As shown in FIG. 5, a conventional flat panel display device has a back electrode 21 . Line cathode 22° beam extraction electrode 23 as an electron beam source
．． Signal electrode 24. Horizontal focusing electrode 25. Horizontal deflection electrode 26
．． Front container 2 forming a vertical deflection electrode 27 and a screen
8 are arranged, and the front container 28 and the front container 2
The components are stored and sealed inside a glass container consisting of 9.
Make a vacuum. An electron beam emitted from a line cathode 22 serving as an electron beam source is transferred to a beam extraction electrode 23. Signal electrode 24. Horizontal focusing electrode 25. Horizontal deflection electrode 26° Vertical deflection electrode 27
The phosphors 30 such as R2O and B on the front container 28 are irradiated and an image is displayed.

When sealing the flat display device configured as described above, as shown in FIGS. A melting point glass 37 is attached, and a vacuum exhaust pipe 3 is attached to the other front container 28.
8, anode terminal 42, pre-fired low melting point glass 37
, measure the electrode assembly and the phosphor 30 respectively in the sealing jig shown in FIG. 4, and gently insert the base 35 on the front container 29 side from above through the slide shaft 43. , in an inert gas atmosphere such as N or Co2 gas to about 400°C to 500°C to melt the low melting point frit glass 37, and place about 50g/c+j of the base 35 between the front container 28 and the manufacturing container 29. A load is applied and the seal is sealed.

Problems to be Solved by the Invention However, sealing of a conventional plasma display having the above configuration or a flat display device such as a fluorescent display tube is difficult.
Powdered glass was applied to the joint between the outer container and the manufacturing container, 42-6 alloy terminals treated with multiple chromium oxides were attached, and the temperature was raised to around 450°C to 500°C to seal. . For this reason, the electrode structure, insulators, etc. that are comprised within the flat display device expand and contract repeatedly through cycles of temperature rise and fall, resulting in differences in expansion coefficients and unrestricted temperature distribution, in other words, the melted frit cools. When doing so, the terminal is fixed in an extended state between the front and the manufacturing container, which causes tension on the electrode after cooling, which may cause the assembly of the electrode assembly to be significantly misaligned, or cracks or warps may occur. There was a problem in that it was extremely difficult to obtain a high-quality display. Especially from 400℃
The reason for this is that the powder glass becomes slightly softened at 500° C., or that the glass plate or the like partially deforms.

Furthermore, in terms of cost, the sealing jig is made of a special material that matches the expansion coefficient of the front glass container and the container being manufactured, and is also required to undergo warpage prevention treatment, processing, and even heat deformation to periodically attach the slide shaft and the front container. Fixed table 2 Requires processing costs for corrections such as vertical misalignment of the container fixing table. Additionally, an N 2 CO 2 atmosphere with a purity higher than about 300° C. is required to prevent oxidation of the tungsten wire of the cathode of the electrode assembly.

In addition, the sealing part only needs to be locally heated, mainly the part of the flat display device to be sealed, but the amount of heat is mostly wasted due to the furnace main body, sealing jig, and furnace preheating, which requires a huge amount of electricity. The cost and design costs are high, and a large amount of space is required. Furthermore, if the container is made of metal, it requires chromium oxide treatment, coating and firing of insulating glass 45 (see FIG. 3), and enormous processing costs in order to insulate the container from a plurality of terminals. In addition, the work of attaching and detaching the flat display device from the sealing jig relies heavily on human experience and intuition, making it difficult to automate and increasing labor costs.Furthermore, it requires at least 3 to 4 hours of sealing time. It takes a lot of time to take it out.

In view of the above-mentioned problems, the present invention eliminates oxidation of the electrode assembly due to heat during sealing, eliminates misalignment of each electrode due to thermal expansion and contraction, eliminates cracking of the front glass container (cost reduction, automation,
The purpose is to provide a flat display device with high yield and high reliability.

Means for Solving the Problems In the flat display device of the present invention, a plurality of terminals for controlling an electrode structure are fixed to a container which is attached to a front container having a phosphor surface.

Effect: With the above configuration, the present invention maintains the electrode assembly at room temperature because the sealing temperature is applied locally in a short time, preventing misalignment, warping, cracking, oxidation, etc. caused by heat, and achieving higher quality. Can be displayed.

Furthermore, the present invention eliminates tension on the electrodes by putting out a plurality of terminals in a manufacturing container, which prevents deformation and warping, greatly increases yield, and furthermore, eliminates the need for sealing, making it possible to manufacture at low cost. can.

EXAMPLE Hereinafter, a flat display device according to an example of the present invention will be described with reference to the drawings.

FIG. 1(a) shows a cross-sectional view of the flat display device in this embodiment, and FIG. 1(b) and (c) are enlarged cross-sectional views of the sealed portion. In FIG. 1, 1 is a metal frame fixed to a front container 8, 2 is a container, 3 is a low melting point frit glass, 4 is a plurality of terminals, 5 is an electrode structure fixing stand, 6 is an electrode structure, and 7 is a phosphor. , 8 is a front container.

The flat display device configured as described above will be specifically explained.

The outer container 8 is an integral type molded using commonly used glass, and is made of a 42=6 alloy (42=6 alloy) of the metal frame 1.
%Hi, 6%Cr, balance Fe) and is made of a material whose expansion coefficient is almost the same. For example, it is the same as that used in commercially available fluorescent display tubes, plasma displays, and the like. Furthermore, this material is chemically strengthened to improve its fracture strength. This outer circumference is 17
The size is 0WX120, the board thickness is 5, and the internal height is 30.
1111, a front container 8 with a width of 4III11 to be bonded to the metal frame 1 and a 42-6 alloy plate with a thickness of 1 mm are formed using a press or the like, and the middle is made to have the same width as the bonding width of the front container 8. A low melting point frit glass 3 is applied between the metal frame 1 from which the outer container 8 and the metal frame 1 are removed, and the temperature is raised to about 450°C in an electric furnace or the like at the same time as the binder baking of the phosphor 7. is glued. In the same way, a plurality of terminal holes are formed by drilling, pressing, etc. in the front container 2, which has a board thickness of 1 mm, an outer circumference of 171 x 121 mm, and a board thickness of IIIvl. A low melting point frit glass 3 is applied between the generally used hermetic terminal 4 which is coated and molded with insulating glass, and heated in a firing furnace to approximately 45 mm.
By firing at 0° C., the front container 2 and the hermetic terminal 4 are bonded together. An electrode assembly fixing base 5 made of metal is laser bonded to the front container 2, and the electrode assembly 6 is fixed thereon by screwing or caulking. Thereafter, the electrode terminal and the hermetic terminal 4 are bonded together using a laser.

The front container 2 with this electrode structure 6 mounted thereon is placed on the stand 1 shown in FIG.
Set to 1. And the X-Y of this electrode.

Measure the pitch, adsorb the outer container 8 with the suction pad 1, align it with the X-Y pitch of the electrode on the electrode structure 6, place it on the outer container 2, and make sure it does not move during sealing. Approximately 1k
Fix by applying a pressure of g / cj, Fig. 1 (b),
(C) (Several laser beams are applied to automatically weld and seal each side in a few minutes. The laser beam welding device may be any carbon dioxide laser device or YAG laser device. After sealing by welding, the temperature is raised to about 300° C. to 350° C. while being evacuated using an exhaust device, the cathode is activated and sealed while baking, and the material is cooled to room temperature.

In this way, by providing a plurality of terminals 4 on the front container,
For sealing, the metal frame 1 and the front container 2 can be locally welded at room temperature, and the entire flat display device is completed without being exposed to high temperatures. effective.

Effects of the Invention As described above, the present invention provides heat-resistant sealing without the need for a sealing furnace by fixing a plurality of terminals for controlling the electrode structure perpendicularly to the front container, which is provided parallel to the phosphor surface of the front glass container. No jig, no insulating frit glass, N2. No CO2 gas, reduced electricity costs, equipment costs, equipment space, etc., reduced heat deformation and
Compared to conventional sealing, this method has significant effects such as prevention of oxidation, shortening of sealing time, and greater cost reduction, automation, high precision, and high yield.

[Brief explanation of the drawing]

FIG. 1(a) is a sectional view of a flat display device according to an embodiment of the present invention, FIGS. 1(b) and (c) are enlarged views of the main parts when sealed, and FIG. 2 is a sectional view of a flat display device according to an embodiment of the invention. Sectional view showing the state at the time, 3rd
Figure (a) is a cross-sectional view showing the state of a conventional flat display device before sealing, Figure 3 (b) is an enlarged view of its main parts, and Figure 4 is a cross-sectional view showing the state when it is sealed. FIG. 5 is an exploded view of the flat display device. 2...Front container, 4...Terminal, 6...
... Electrode structure, 7 ... Phosphor surface, 8 ...
・・Table container. Name of agent: Patent attorney Shigetaka Awano

Claims (1)

[Claims] A flat display device characterized in that a plurality of terminals for controlling an electrode structure are fixed to a back container attached to a front container having a phosphor surface.