High-Power-Factor Single-Stage LCC Resonant Inverter for Liquid Crystal Display Backlight

Author

Li, Zhe ; Park, Chun-Yoon ; Kwon, Jung-Min ; Kwon, Bong-Hwan

Author_Institution

Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol., Pohang, South Korea

Volume

58

Issue

3

fYear

2011

fDate

3/1/2011 12:00:00 AM

Firstpage

1008

Lastpage

1015

Abstract

The aim of this paper is to propose a high-power-factor (HPF) single-stage inductor-capacitor-capacitor (LCC) resonant inverter for liquid crystal display (LCD) backlight. A half-bridge LCC resonant inverter shares switches with a power-factor-correction circuit to form single stage. The proposed single-stage LCC resonant inverter can achieve almost unity power factor and ripple-free input current by using a coupled inductor, and can also realize zero-voltage-switching by operating the switches above the resonant frequency. Thus, the proposed single-stage inverter not only provides HPF to the utility line, but also achieves circuit simplicity, low cost, and high reliability. Experimental results on a 32-in LCD backlight are obtained to show the performance of the proposed inverter.

Keywords

liquid crystal displays; power factor correction; resonant invertors; zero voltage switching; coupled inductor; high-power-factor single-stage LCC resonant inverter; inductor-capacitor-capacitor resonant inverter; liquid crystal display backlight; power-factor-correction circuit; zero-voltage-switching; Power-factor-correction (PFC); resonant inverter; single-stage;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2010.2048294

Filename

5456229