Title:
BULB-SHAPED FLUORESCENT LAMP AND LUMINAIRE
Document Type and Number:
Japanese Patent JP2004146331
Kind Code:
A
Abstract:
To provide a bulb-shaped fluorescent lamp capable of improving luminous flux build-up characteristics with a simple structure, even when amalgam for controlling a mercury vapor pressure is enclosed.
An arc tube projecting part is protruded toward the base side and a temperature whereat a mercury vapor pressure to maximize emission efficiency is obtained can be given to a part of it. As a result, in comparison with the conventional case in which amalgam having a low mercury vapor pressure, luminous flux build-up characteristics right after lighting are enhanced, and lowering of emission efficiency during lighting can be suppressed.
Inventors:
TAKAHARA YUICHIRO
IKADA KUNIHIKO
IKEDA TOSHIYUKI
ONO TETSUYA
YASUDA TAKEO
IKADA KUNIHIKO
IKEDA TOSHIYUKI
ONO TETSUYA
YASUDA TAKEO
Application Number:
JP2002378869A
Publication Date:
May 20, 2004
Filing Date:
December 27, 2002
Export Citation:
Assignee:
TOSHIBA LIGHTING & TECHNOLOGY
International Classes:
F21S2/00; H01J61/28; H01J61/30; F21Y103/37; (IPC1-7): F21S2/00; H01J61/28; H01J61/30
Attorney, Agent or Firm:
Junichi Izumi
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