Auxiliary light source and lighting system having the same
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United States of America Patent
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Issued Date -
Sep 10, 2009
app pub date -
Jan 8, 2009
filing date -
Mar 6, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The auxiliary light source includes a vacuum chamber, a pair of electrodes, and fluorescent material. The vacuum chamber has an internal space which is evacuated. The pair of electrodes is situated inside the vacuum chamber so as to face each other. The fluorescent material is arranged inside the vacuum chamber and emits light including ultraviolet rays by receiving electrons emitted when voltage is applied between the electrodes. An arc tube of a high-pressure discharge lamp is situated within an irradiation range of the light, and the light is emitted at least from a time just before the high-pressure discharge lamp is turned on until the high-pressure lamp emits light.
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