METAL HALIDE LAMP

Japanese Patent JP3959940

B2

PROBLEM TO BE SOLVED: To provide a DC-type metal halide lamp usable for general lighting, applicable to all lighting positions, and having a discharge container made of ceramics.
SOLUTION: This metal halide lamp has an arc tube 7 filled with mercury, a rare gas, and a halide. The arc tube 7 has a positive electrode and a negative electrode sealed therein, has at least one heat shield (8, 9 of Figure) on the negative-electrode side of the arc tube 7, and is applicable to all lighting positions. The two electrodes sealed in the arc tube 7 are different in shape from each other. The positive electrode is made of tungsten and has a spherical end part, while the negative electrode is made up of a rod made of thorium tungsten and a coil 2 on the rod.

JP2001015070	DISCHARGE LAMP
JP4489206	Flash discharge tube
JP4725958	Positive electrode for discharge lamp

Hong Gang
Jacob Maya

JP2000254439A

August 15, 2007

August 24, 2000

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MATSUSHITA ELECTRIC WORKS,LTD.

H01J61/073; H01J61/20; H01J61/52; H01J61/54; H01J61/82; (IPC1-7): H01J61/073; H01J61/20; H01J61/52; H01J61/54

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Keisei Nishikawa
Atsuo Mori

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