Image-forming apparatus having vent tubes

Details Image-forming apparatus having vent tubes Image-forming apparatus having vent tubes

1995-06-07

1999-09-14

Patel, Vip

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313495, 313487, H01J 2870

Patent

active

059527757

ABSTRACT:
An image-forming apparatus has a rear plate including electron-emitting devices formed thereon, a face plate including a fluorescent film formed thereon and being disposed to face the rear plate, flat plate spacers disposed between the rear plate and the face plate, and an outer frame surrounding peripheral edges of the rear plate and the face plate. Electrons emitted from the electron-emitting devices are irradiated to the fluorescent film to thereby display an image under condition where an inner space of a container constructed by the rear plate, the face plate and the outer frame is evacuated through a vent tube into a depressurized state. The vent tube is attached to a side of the outer frame that is positioned across an imaginary extension of the flat-plate spacer in the longitudinal direction thereof, or to the face plate or the rear plate in the vicinity of that side of the outer frame. With such arrangements, evacuation conductance is increased to reduce an evacuation time, and a higher vacuum level is achieved in the container so that an image can be stably displayed for a long time.

REFERENCES:
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patent: 3914000 (1975-10-01), Beckerman et al.
patent: 4841194 (1989-06-01), Kishino et al.
patent: 5072311 (1991-12-01), Hiramatsu et al.
patent: 5537001 (1996-07-01), Clerc
H. Araki, et al., "Electroforming and Electron Emission of Carbon Thin Films", Journal of the Vacuum Society of Japan, vol. 26, No. 1, pp. 22-29 (Jan. 26, 1983).
G. Dittmer, "Electrical Conduction and Electron Emission of Discontinuous Thin Films", Thin Solid Films, No. 9 (pp. 317-328), 1972.
C.A. Spindt, et al., "Physical properties of Thin-Film Emission Cathodes with Molybdenum cones", Journal of Applied Physics, vol. 47, No. 12, pp. 5248-5263 (Dec. 1976).
M. Hartwell, et al., "Strong Electron Emission From Patterned Tin-Indium Oxide Thin Films", Int'l. Electron Devices Meeting, pp. 519-521 (1975).

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