New design and application of high efficiency LED driving system for RGB-LED backlight in LCD display

Novel RGB-LED driving system for LED backlight in LCD display have been developed and demonstrated. The driving system consists of the non-isolation type high efficiency constant current DC-DC converter and the dynamic controller with microcontroller. The efficiency of driver is up to 94.4% and the maximum color deviation, Δu'v', from the target is 0.002.