LIGHT SOURCE DEVICE, PROJECTOR, AND PROJECTION SYSTEM
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United States of America Patent
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app pub date -
Jun 5, 2014
filing date -
Jun 10, 2013
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Abstract
A light source device includes a discharge lamp configured to emit light, a discharge lamp driving unit configured to supply a driving current for driving the discharge lamp to the discharge lamp, and a control unit configured to control the discharge lamp driving unit. A driving current waveform of the driving current alternately has a first period and a second period. An absolute value of the driving current during the first period is smaller than an absolute value of the driving current during the second period. The control unit is configured to supply an alternating current as the driving current to the discharge lamp during the first period. A frequency of the alternating current during the first period is equal to or higher than 750 Hz.
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