Light emitting element drive device and mobile apparatus
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United States of America Patent
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Mar 3, 2015
Grant Date -
Oct 18, 2012
app pub date -
Jan 31, 2011
filing date -
Feb 1, 2010
priority date (Note) -
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Abstract
A light emitting element drive device of the present invention includes a light emitting element; a drive unit for driving the light emitting element; an electricity storage element capable of storing electric power; a battery power supply capable of supplying electric power to the electricity storage element; and a boost chopper circuit having an inductor, for boosting voltage by opening and closing a switching element. The drive unit is switchable between three states: a storing state in which electric power from the battery power supply is stored in the electricity storage element; a first discharging state in which the electric power stored in the electricity storage element is supplied to the light emitting element; and a second discharging state in which electric power from the battery power supply is boosted by the boost chopper circuit and is supplied to the light emitting element.
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