LIGHT SOURCE DEVICE, DRIVING METHOD THEREOF AND DISPLAY DEVICE HAVING THE SAME

摘要

Provided are a light source device which is capable of preventing reduction in luminance, a method for driving the light source device, and a display device having the light source device. The light source device comprises: multiple LED strings and an LED driving circuit. The LED strings comprise multiple LEDs connected in series, and emitting light. The LED driving circuit applies a driving voltage to the LED strings, maximizes the driving voltage applied to the LED strings by using a minimum string current of string currents applied to each LED string during an early operation, and applies the maximum driving voltage to the LED strings by blocking currents flowing through a sense resistor disposed to sense the minimum string current during a normal operation.