Automotive discharge lamp
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United States of America Patent
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Aug 14, 2012
Grant Date -
Dec 16, 2010
app pub date -
Dec 10, 2008
filing date -
Feb 14, 2008
priority date (Note) -
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Abstract
An automotive discharge lamp, having an inner tube including a light emitting unit having a first space therein and seal portions formed on the light emitting unit, a discharge medium containing a first gas enclosed in the first space, a metal foil sealed in the seal portions, electrodes with one end connected to the metal foil and other end extended into the first space, and an outer tube connected to the inner tube to form a second space between the outer tube and the inner tube, wherein the second space has a second gas enclosed therein and the oxygen concentration in the second space is 1.0 volume % or less.
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