Microcontroller-based backlight module with DPLL function for reducing the parasitic capacitance effect in LCD panel housing

Chang Hua Lin*, Kai Jun Pai, Chien Ming Wang

*此作品的通信作者

研究成果: 書貢獻/報告類型會議論文篇章

3 引文 斯高帕斯(Scopus)

摘要

A microcontroller-based backlight module is proposed to reduce the leakage current effect in LCD. First, the mathematical model of the parasitical capacitance in LCD panel is conducted to explore the influence of leakage current effect. Moreover, a class D resonant backlight inverter is employed to act as the main circuit. Next, the phase angle variations caused by the parasitic capacitances is considered as a reference parameter in the proposed control strategy. By using the primary-side control and incorporating the DPLL function programmed by software to form a feedback mechanism to track the optimal operating frequency. And then the influence of parasitic capacitance can be reduced so as to eliminate the leakage current effect, hence, the system efficiency and stability will be improved. Complete mathematical analysis and design considerations are detailed. Experimental results agree with the theoretical predictions.

原文英語
主出版物標題2008 IEEE International Conference on Industrial Technology, IEEE ICIT 2008 - Conference Proceedings
DOIs
出版狀態已發佈 - 2008
事件2008 IEEE International Conference on Industrial Technology, IEEE ICIT 2008 - Chengdu, 中国
持續時間: 2008 4月 212008 4月 24

出版系列

名字Proceedings of the IEEE International Conference on Industrial Technology

會議

會議2008 IEEE International Conference on Industrial Technology, IEEE ICIT 2008
國家/地區中国
城市Chengdu
期間2008/04/212008/04/24

ASJC Scopus subject areas

  • 電腦科學應用
  • 電氣與電子工程

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