A Highly Power-Efficient LED Back-Light Power Supply for LCD Display

Author

Woo-Young Choi

Author_Institution

Div. of Electron. Eng., Chonbuk Nat. Univ., Jeon-ju, South Korea

Volume

9

Issue

5

fYear

2013

fDate

May-13

Firstpage

382

Lastpage

387

Abstract

This paper proposes a highly power-efficient light-emitting diode (LED) back-light power supply for liquid crystal display (LCD). The proposed converter integrates the power factor correction (PFC) circuit with the dc-dc converter. It provides an isolated dc voltage without using any full-bridge diode rectifier. Conduction losses are reduced by eliminating the full-bridge diode rectifier. Switching power losses are also reduced by achieving zero-voltage switching (ZVS) operation of power switches. By reducing power losses, the power efficiency of the LED back-light power supply can be improved. The experimental results are presented to verify the feasibility of the proposed converter for a 100 W LED back-light power.

Keywords

DC-DC power convertors; LED displays; power supply circuits; zero voltage switching; DC-DC converter; LCD display; conduction loss; highly power efficient LED back light; isolated DC voltage; light emitting diode back light power supply; power 100 W; power factor correction circuit; zero voltage switching; Converters; Light emitting diodes; Liquid crystal displays; Power distribution; Back-light power supply; dc–dc converter; light-emitting diode (LED); liquid crystal display (LCD); power factor correction (PFC);

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2013.2248120

Filename

6488768