Discharge lamp igniting apparatus
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United States of America Patent
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Apr 21, 2015
Grant Date -
Sep 4, 2014
app pub date -
Sep 23, 2013
filing date -
Mar 1, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A power supply circuit (4) is responsive to an activating signal by supplying a discharge lamp (2) with an operating voltage on which a high voltage is temporality superposed. An insufficient current detecting circuit (46) detects abnormality of an output current supplied to the discharge lamp (2) from the power supply circuit (4). A CPU (52) stops the operation of the power supply circuit (4) in response to detection of abnormality by the insufficient current detecting circuit (46). An output nullification time period timer (50) nullifies the output of the insufficient current detecting circuit (46) for a predetermined time period measured from the supplying of the activating signal.
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