A high-input-voltage backlight module driver for multi-lamp LCD panels

Yu Kang Lo*, Kai Jun Pai, Kuan Hung Wu, Huang Jen Chiu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A half-bridge (HB) resonant inverter for driving a backlight module with multiple cold cathode fluorescent lamps (CCFLs) is proposed. Conventionally, a backlight module driving inverter is designed to operate with a low-input DC voltage. Therefore, a buck converter is required to step down the high-output DC voltage of a power factor correction (PFC) pre-regulator. The circuit cost is high and the conversion efficiency is low. In this letter, a high-input-voltage HB resonant inverter with only one transformer is used to drive multiple lamps. Analysis and design considerations are discussed in detail. Simulations and experimental results are close to the theoretical prediction.

Original languageEnglish
Pages (from-to)533-542
Number of pages10
JournalInternational Journal of Circuit Theory and Applications
Volume39
Issue number5
DOIs
Publication statusPublished - 2011 May

Keywords

  • cold cathode fluorescent lamp
  • half-bridge resonant inverter
  • LCD backlight module
  • power factor correction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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