Title:
FLUORESCENT LAMP AND MERCURY VAPOR PRESSURE CONTROL METHOD FOR FLUORESCENT LAMP
Document Type and Number:
Japanese Patent JP2007227399
Kind Code:
A
Abstract:
To suppress, in use of a fluorescent lamp in a high-temperature environment, rise of lamp voltage and prevent a lighting failure by operation of an inverter protective circuit.
In the fluorescent lamp 10 comprising a U-shaped light emitting tube 300 sealing amalgam 310, an end part of the light emitting tube 300 is extended to set a cooling part 500. When mercury vapor pressure in the light emitting tube 300 is raised during lighting in a high-temperature state, the cooling part 300 is cooled with the outside air to condense the mercury vapor, generating liquid mercy, whereby the rise of lamp voltage is prevented.
COPYRIGHT: (C)2007,JPO&INPIT
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Inventors:
OSAWA TAKASHI
IKEDA MITSUHIRO
KONDO KAZUYOSHI
YANAGI TADASHI
MURAKAMI KATSUO
IKEDA MITSUHIRO
KONDO KAZUYOSHI
YANAGI TADASHI
MURAKAMI KATSUO
Application Number:
JP2007118887A
Publication Date:
September 06, 2007
Filing Date:
April 27, 2007
Export Citation:
Assignee:
OSRAM MELCO LTD
International Classes:
H01J61/32; H01J61/28
Attorney, Agent or Firm:
Shoji Mizoi