Discharge lamp driver, light source, projector, and method of driving discharge lamp
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United States of America Patent
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Aug 8, 2017
Grant Date -
Dec 4, 2014
app pub date -
May 20, 2014
filing date -
May 29, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A discharge lamp driver includes a discharge lamp drive unit that supplies a drive current to the discharge lamp, and a control unit that controls the discharge lamp drive unit according to a drive current waveform, wherein the drive current waveform has a mixed frequency drive period including a unit drive period containing a first drive period in which a first drive current is supplied to the discharge lamp and a second drive period provided immediately after the first drive period, in which a second drive current is supplied to the discharge lamp, the first drive current is a half-period alternating current having a frequency higher than 10 Hz and not higher than 300 Hz, the second drive current is an alternating current having a frequency higher than 1000 Hz, and a length of the second drive period is equal to or longer than a length of the first drive period.
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