| 摘要 |
<p>PURPOSE: A power supply device for a light emitting diode is provided to prevent a high voltage supplied to a driving IC with a low withstand voltage by including a sink switching unit and a buffer switching unit. CONSTITUTION: A sink switching unit(200) is turned on by receiving a first voltage and controls an LED voltage supplied to one or more light emitting diodes(100). A buffer switching unit(210) supplies the LED voltage from the sink switching unit to a reference voltage source in a turn-on period and blocks the LED voltage supplied to a driving IC(300) by turning off the sink switching unit in a turn-off period.</p> |
