A high-input-voltage backlight module driver for multi-lamp LCD panels
✍ Scribed by Yu-Kang Lo; Kai-Jun Pai; Kuan-Hung Wu; Huang-Jen Chiu
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 367 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0098-9886
- DOI
- 10.1002/cta.639
No coin nor oath required. For personal study only.
✦ Synopsis
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. Copyright © 2010 John Wiley & Sons, Ltd.