Image display apparatus, method of manufacturing the same, and sealing-material applying device
AssigneeKabushiki Kaisha Toshiba
InventorsAkiyoshi Yamada, Takashi Nishimura, Hirotaka Murata, Kazuyuki Seino
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Abstract
The evacuated envelope of an image display apparatus has a rear substrate, a front substrate opposing the rear substrate, and a sidewall interposed between the rear and front substrates. A phosphor screen is formed on the inner surface of the front substrate. Electron-emitting elements are provided on the rear substrate. An indium layer is formed on a sealing surface lying between the front substrate and the sidewall. When the indium layer is heated and melted in a vacuum atmosphere, the front and rear substrates are sealed to each other, with the sidewall interposed between them.
Claims13
A method of manufacturing an image display apparatus which comprises an envelope having a rear substrate, a front substrate opposing the rear substrate, and a plurality of electron-emitting elements provided in the envelope, the method comprising:
- continuously applying molten metal sealing material along a sealing surface lying between the rear substrate and the front substrate, while applying ultrasonic waves directly to the molten metal;
- and
- heating and melting the metal sealing material in a vacuum atmosphere after the metal sealing material has been applied, and sealing the rear substrate and the front substrate at the sealing surface, either directly or indirectly to each other.
A method of manufacturing an image display apparatus which comprises an envelope having a rear substrate, a front substrate opposing the rear substrate, a sidewall sealed between peripheral edge parts of the front substrate and the rear substrate;
- and a plurality of electron-emitting elements provided in the envelope, wherein at least one of sealing surfaces between the front substrate and the sidewall and between the rear substrate and the sidewall, or the front substrate and the sidewall is sealed with a metal sealing material layer, the method comprising:
- continuously applying molten metal sealing material along said at least one of sealing surfaces, while applying ultrasonic waves directly to the molten metal;
- and
- heating and melting the metal sealing material in a vacuum atmosphere after the metal sealing material has been applied, and sealing the rear substrate, the front substrate and the sidewall together at the sealing surface.
A method of manufacturing an image display apparatus comprising an envelope having a rear substrate, a front substrate opposing the rear substrate and sealed either directly or indirectly to the rear substrate with metal sealing material, and a number of electron-emitting elements provided in the envelope, the method comprising:
- applying molten metal sealing material to a sealing surface laying between the rear substrate and the front substrate, thereby forming a metal sealing material layer which extends along the entirety of the sealing surface;
- and
- heating and melting the metal sealing material in a vacuum atmosphere after the metal sealing material has been applied, and sealing the rear substrate and the front substrate at the sealing surface, either directly or indirectly to each other,
- wherein, in the step of applying the metal sealing material, bent or curved parts are formed at one portion, at least, of the metal sealing material layer at a predetermined pitch, which extends along a straight part of the sealing surface.
Dependencies are inferred from the claim text.