Title :
Design of class E backlight module incorporating piezoelectric transformer
Author :
Lin, Chang-Hua ; Chen, Ying-Chi
Author_Institution :
Dept. of Comput. & Commun. Eng., St. John´´s & St. Mary´´s Inst. of Technol., Taipei, Taiwan
Abstract :
A novel single-stage backlight module constituted by class E topology for simplifying the circuit structure and promoting the system efficiency is proposed in this paper. Moreover, in order to overcome the drawbacks of the conventional electromagnetic transformer and miniaturize the backlight module, the piezoelectric transformer (PT) is adopted for driving the cold cathode fluorescent lamp. A simple model and design procedure are constructed by reasonable parameter simplification and combination schemes. Complete analysis and design considerations are discussed in detail. Experimental results agree with the theoretical prediction.
Keywords :
design engineering; electronic equipment testing; flat panel displays; fluorescent screens; lighting; piezoelectric devices; power electronics; transformers; circuit structure; class E backlight module design; class E topology; cold cathode fluorescent lamp driving; design procedure; electromagnetic transformer drawbacks; model; parameter combination schemes; parameter simplification; piezoelectric transformer; single-stage backlight module; system efficiency; Cathodes; Flat panel displays; Fluorescent lamps; Inductors; Light emitting diodes; Liquid crystal displays; Piezoelectric effect; RLC circuits; Resonant inverters; Voltage;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1465422
