DRIVING DEVICE FOR A LIGHT EMITTING DIODE CIRCUIT AND RELATED LIGHTING DEVICE
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United States of America Patent
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Issued Date -
Mar 17, 2011
app pub date -
Sep 16, 2009
filing date -
Sep 16, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A driving device for an LED circuit includes a power receiving terminal, a capacitor, and a light adjusting unit. The power receiving terminal is coupled to a switch for receiving a DC power source that supplies for the LED circuit and the driving device via the switch. The capacitor is coupled to the power receiving terminal, and is utilized for storing energy. The light adjusting unit is coupled to the power receiving terminal and the capacitor, and is utilized for generating a control signal according the status of the switch when a voltage on the capacitor decreases and does not decrease below a first threshold voltage, for adjusting light intensity of the LED circuit.
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