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Title page for etd-0211110-135552


URN etd-0211110-135552 Statistics This thesis had been viewed 2967 times. Download 0 times.
Author Shang-Po Hsieh
Author's Email Address No Public.
Department Electrical Engineering
Year 2009 Semester 1
Degree Master Type of Document Master's Thesis
Language zh-TW.Big5 Chinese Page Count 202
Title Multi-lamp CCFL Electronic Ballast Incorporating Circulating Digital Dimming Technique
Keyword
  • Class-D resonant inverter
  • cold cathode fluorescent lamp (CCFL)
  • conventional dimmer
  • digital dimming technique
  • digital dimming technique
  • conventional dimmer
  • cold cathode fluorescent lamp (CCFL)
  • Class-D resonant inverter
  • Abstract This thesis proposes a circulating digital dimming technique for multiple cold cathode fluorescent lamps. The proposed method integrated the conventional dimming control circuit and digital dimming technique to achieve circulating dimming control. Digital–dimming control is used to modulate the average brightness of the CCFLs by adjusting the low frequency dimming signal under rated lamp current. Therefore, this method can reduce leakage current and widen the dimming range. Moreover, the conventional dimming control circuit can adjust lamp brightness by a circulating logic signal. The proposed circuit integrated these two techniques to adjust the duty cycle of the low frequency dimming signal by switching circulating logic signal, and then to achieve the circulating digital dimming function. All the experimental results are used to verify the feasibility of the proposed system.
    Advisor Committee
  • Chang-Hua Lin - advisor
  • none - co-chair
  • none - co-chair
  • Files indicate not accessible
    Date of Defense 2010-01-28 Date of Submission 2010-02-11


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