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

Volume

10

Issue

5

fYear

2014

fDate

May-14

Firstpage

407

Lastpage

413

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;

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2014.2302019

Filename

6719537