Design and implementation of RGB LED drivers for LCD backlight modules

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

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

102 引文 斯高帕斯(Scopus)

摘要

In this paper, a backlight module driver driving highpower red, green, and blue light-emitting diodes (RGB LEDs) for a 19-in liquid crystal display is proposed. The dc-dc series resonant converters (SRCs) with zero-voltage switching and constantoutput- current control are implemented to drive the RGB LED arrays. Phase-shifted pulsewidth modulation dimming control is adopted to effectively narrow the load variations and improve the output voltage regulations of the SRCs. A DSP-based hysteresis control algorithm is performed to track the white-color point and the specified backlight luminance. Analysis and design considerations of the proposed drivers are presented in detail. Experimental results agree well with the theoretical predictions and confirm the validity of the proposed approach.

原文英語
文章編號5166500
頁(從 - 到)4862-4871
頁數10
期刊IEEE Transactions on Industrial Electronics
56
發行號12
DOIs
出版狀態已發佈 - 2009 12月

ASJC Scopus subject areas

  • 控制與系統工程
  • 電氣與電子工程

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