POWER CONTROL SYSTEM FOR DRIVING LED

摘要

PURPOSE: A power control system for driving an LED is provided to actively correspond to a difference between voltages applied to each LED string by automatically changing a power value supplied to the LED string according to the number of the LED string. CONSTITUTION: A DC power supply unit supplies DC power for driving an LED. An LED string unit receives DC power from the DC power supply unit and emits light. An LED channel(230) is connected to each LED string unit. An LED channel detects a voltage applied to each string unit for comparing the voltage applied to the each string unit with a reference voltage. A feed back current control unit(240) controls the voltage supplied to the LED string unit with a desirable level.