A High-Voltage Input Backlight Module Driver for Multi-Lamp LCD Panels

Author

Lo, Yu-Kang ; Pai, Kai-Jun ; Yen, Shang-Chin

Author_Institution

Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei

Volume

1

fYear

0

Firstpage

663

Lastpage

665

Abstract

A high-voltage DC input backlight module driver for multi-lamp LCD panels is presented in this paper. The 400-V DC output of a power factor corrector (PFC) is directly coupled to a class-D resonant inverter. Thus the requirement of a buck converter conventionally adopted to provide a low input voltage for the DC/AC inverter is eliminated. Also a single transformer with multiple secondaries is utilized to drive multiple lamps. The proposed backlight module driver features less circuit components, a lower cost and a higher efficiency. Design considerations are discussed and design procedures are derived. Simulations and experimental results confirm with the theoretical analysis

Keywords

DC-AC power convertors; driver circuits; lamps; liquid crystal displays; power factor correction; resonant invertors; DC-AC inverter; class-D resonant inverter; high-voltage input backlight module driver; multilamp LCD panels; power factor corrector; Analytical models; Buck converters; Circuit simulation; Costs; Coupling circuits; Driver circuits; Lamps; Low voltage; Reactive power; Resonant inverters; Class-D parallel resonant inverter; LCD backlight module; cold cathode fluorescent lamp; power factor corrector;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Drives Systems, 2005. PEDS 2005. International Conference on

Conference_Location

Kuala Lumpur

Print_ISBN

0-7803-9296-5

Type

conf

DOI

10.1109/PEDS.2005.1619768

Filename

1619768