Title :
Single Power-Conversion LED Backlight Driving System With High Power Factor Control
Author :
Woo-Jun Cha ; Yong-Won Cho ; Jung-Min Kwon ; Bong-Hwan Kwon
Author_Institution :
Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol. (POSTECH), Pohang, South Korea
Abstract :
A single power-conversion LED backlight driving system with high power factor control is proposed. The proposed converter is composed of a full-bridge diode rectifier and a quasi-resonant flyback converter. The proposed converter provides a simple structure, a low cost, and high power factor of 0.988 by using the novel control algorithm without the PFC circuit. To achieve good controllability, the novel control algorithm is transformed by adding a nominal value predetermined to relax its control burden. Detailed analysis and experimental results for a 90-W prototype are discussed.
Keywords :
light emitting diodes; power control; power convertors; power factor; PFC circuit; full-bridge diode rectifier; high power factor control; power 90 W; quasiresonant flyback converter; single power-conversion LED backlight driving system; AC-DC power converters; Capacitors; Light emitting diodes; Reactive power; Rectifiers; Switches; Voltage control; Single power-conversion; power factor control; quasi-resonant flyback converter;
Journal_Title :
Display Technology, Journal of
DOI :
10.1109/JDT.2014.2302019
