A low-temperature driving scheme of EEFLS inverter for LCD TV backlights

Tae Seung Cho, Jin Woo Jung, Dong Myung Lee, Eun Ha Choi, Guangsup Cho

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

A new low-temperature driving method of EEFLs (External Electrode Fluorescent Lamps) inverter for LCD TV backlights is proposed. The proposed driving scheme achieves a zero current switching (ZCS) of lower switches and dramatically reduces the temperature of the transformer at which the power loss mainly occurs. Moreover, the capacitance of EEFLs is calculated by the QV Lissajous analysis method and then the optimal switching interval for a low heating loss of the transformer is determined. To investigate the feasibility of the proposed driving method, various experimental results using a prototype 17-inch LCD TV backlight with 12 EEFLs are presented.

Original languageEnglish
Pages (from-to)699-706
Number of pages8
JournalIEEE Transactions on Consumer Electronics
Volume55
Issue number2
DOIs
StatePublished - 2009

Keywords

  • Driving circuit
  • Driving method
  • EEFL
  • Fullbridge inverter
  • LCD backlight
  • Low temperature
  • Trapezoidal waveform

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