Electric lamp and discharge devices: systems – Plural power supplies – Plural cathode and/or anode load device
Patent
1995-10-19
1997-09-16
Gonzalez, Frank
Electric lamp and discharge devices: systems
Plural power supplies
Plural cathode and/or anode load device
315 58, 313594, 313607, 313573, G09G 310
Patent
active
056684436
ABSTRACT:
A display fluorescent lamp comprises; a dielectric cylindrical container having a large-diameter portion in which rare gas is sealed and a small-diameter portion which is almost coaxially connected with the large-diameter portion at one end of the large-diameter portion, the outside diameter thereof being smaller than that of the large-diameter portion; a light emitting portion which is formed at the other end of the large-diameter portion and has permeability; an internal electrode which is inserted into the cylindrical container from the other end of the small-diameter portion which is not connected with the large-diameter portion; a fluorescent substance layer formed on the inside face excluding that in which the light emitting portion is formed, of the large-diameter portion of the cylindrical container; and an external electrode formed on the outside face of the large-diameter portion excluding a portion in which the light emitting portion of the cylindrical container is formed, the length in the axial direction, of the small-diameter portion of the cylindrical container being set so as to be longer than an insulation distance required against a voltage to be applied between the internal electrode and the external electrode. Consequently, it is possible to ensure a sufficient insulation distance between the internal electrode and the external electrode even if the diameter of a glass valve is small.
REFERENCES:
patent: 3882357 (1975-05-01), Nieuweber et al.
patent: 4461978 (1984-07-01), Mikoshiba et al.
patent: 4645979 (1987-02-01), Chow
patent: 4887002 (1989-12-01), Dobashi et al.
Kawaguchi Hironobu
Matsumoto Sadayuki
Tomimatsu Noriyuki
Yoshioka Kazuo
Gonzalez Frank
Mitsubishi Denki & Kabushiki Kaisha
Ratliff Reginald
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