Light emitting element drive device and lighting device
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United States of America Patent
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Jul 22, 2014
Grant Date -
Jun 13, 2013
app pub date -
Dec 6, 2012
filing date -
Dec 8, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A light emitting element drive device includes an electric conduction switch that is provided along a power input line, a voltage detection unit that detects a power source voltage containing a noise component when the electric power is supplied to the power input line, a conversion processing unit that converts the detected power source voltage containing the noise component to a digital value, a data generation unit that generates data of a predetermined number of bits, and a control unit that turns on the electric conduction switch. The control unit determines a delay time based on the predetermined number of bits. The delay time corresponds to a time between supplying the electric power to the power input line and turning on the electric conduction switch. The control unit turns on the electric conduction switch after the delay time passes. Thus, an excessive rush current is prevented.
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