Lamp End of Life Indicator
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United States of America Patent
Stats
-
N/A
Issued Date -
Jan 4, 2007
app pub date -
Jun 26, 2006
filing date -
Jul 1, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The apparatus signals when a high intensity discharge lamp is nearing the end of its operational life. The apparatus includes a lamp drive signal source that provides a drive signal to the high intensity discharge lamp. The lamp drive signal source has a measurable drive parameter. A controller controls the operation of the high intensity discharge lamp. The controller is capable of delaying activation of the lamp drive signal source in response to a measured value of the operating voltage of the high intensity discharge lamp.
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