LED DRIVING CIRCUIT CONTROLLING SUPPLY VOLTAGE WITH DIGITAL DATA

摘要

PURPOSE: A light emitting diode driving circuit is provided to reduce power consumption by determining a voltage level of a driving voltage according to digital data. CONSTITUTION: A light emitting block(100) comprises an LED string unit(110) and a current sourcing unit(120). The LED string unit comprises LED strings(ST1-STn). The current sourcing unit comprises current sources(SC1-SCn). A driving voltage generating block(200) comprises a variable resistance(RV), a voltage converting unit and a capacitor. A feedback block(300) monitors the voltage of sourcing terminals(NSC1-NSCn).