Discharge lamp driving device, projector, and discharge lamp driving method
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United States of America Patent
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Dec 27, 2016
Issued Date -
N/A
app pub date -
Oct 1, 2014
filing date -
Oct 11, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A discharge lamp driving device includes: a discharge lamp driving unit which supplies drive power to a discharge lamp; and a control unit which controls the discharge lamp driving unit according to a waveform of the drive power. The waveform has n launching periods and a low-power mode lighting period. The n launching periods include a first launching period in which the drive power increases toward refresh power that is equal to or above drive power in a low-power mode and equal to or below rated power, and (n−1) launching periods in which the drive power is maintained at the refresh power. The control unit, in an x-th launching period, supplies the discharge lamp with a drive current having a drive frequency equal to or below a drive frequency of a drive current supplied to the discharge lamp in an (x−1)th launching period.
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