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A High-Voltage Discharging Test Circuit for Cold Cathode Fluorescent Lamps

In this thesis, a high voltage discharging testing circuit is proposed for cold cathode fluorescent lamps(CCFLs). The testing circuit uses only a single active power switch operating at a high frequency incorporating with reactive components to accumulate a relatively high voltage on the capacitor. This voltage is then stepped up by a transformer to provide the required high voltage for discharging the CCFLs. The circuit has the advantages of simple configuration, less component count, and low cost. In addition, a high power factor at the ac line source can be achieved.
The proposed circuit is analyzed based on the mode operation. Accordingly, the design equations are derived to determine the circuit parameters. A prototype is designed and built for testing the 19 inch CCFLs. The discharging tests are made to recognize the malfunctions during the manufacturing process. Moreover, the distributions on the spectral power and chromaticity of lamps can be examined to ensure the product quality.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0826108-103859
Date26 August 2008
CreatorsLu, Cheng-Lin
ContributorsHung-Liang Cheng, Chin-Sien Moo, Hung-Liang Cheng, Hung-Liang Cheng, Jia-You Lee, Tsorng-Juu Liang, Jia-You Lee, Jia-You Lee, Ching-Ran Lee, Hung-Liang Cheng
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0826108-103859
Rightsnot_available, Copyright information available at source archive

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