Trans-admittance control for eliminating the temperature effect of piezoelectric transformer in the CCFL backlight module

Yu Kang Lo*, 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

3 引文 斯高帕斯(Scopus)

摘要

A half-bridge (HB) resonant inverter for driving a cold cathode fluorescent lamp (CCFL) backlight module with a piezoelectric transformer (PT) is analyzed in this paper. The resonant inductance of the HB inverter is expressed as a function of the load current, the load resistance and the PT circuit parameters. Also, the trans-admittance of the PT-CCFL combination network is measured to track the operating frequency for the HB resonant inverter, which may be varied due to the temperature rise of PT. The lamp driving current and power can thus remain almost constant in a wide temperature range. Experiments show that the observed results match the theoretical analyses.

原文英語
頁(從 - 到)939-952
頁數14
期刊International Journal of Circuit Theory and Applications
36
發行號8
DOIs
出版狀態已發佈 - 2008 11月

ASJC Scopus subject areas

  • 電子、光磁材料
  • 電腦科學應用
  • 電氣與電子工程
  • 應用數學

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