METAL HALIDE LAMP
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United States of America Patent
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N/A
Issued Date -
Oct 27, 2011
app pub date -
Jun 17, 2008
filing date -
Aug 21, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed is a metal halide lamp, comprising an airtight tube having a discharge portion with a discharge space therein and a pair of sealing portions formed at both ends of the discharge portion; a discharge medium substantially free from mercury enclosed in the discharge space, the discharge medium including a rare gas and a metal halide, the metal halide including a scandium halide; metal foils sealed in the sealing portions; a pair of electrodes having one ends connected to the metal foils and the other ends arranged to face each other within the discharge space; and coils wound around the electrodes within the sealing portions, wherein the scandium halide has a weight ratio of not less than 30%, and the coils have an outer diameter R of not less than 0.45 mm but not more than 0.60 mm.
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