Title :
Application of maximum-efficiency tracking control for backlight module based on phase-locked loop technique
Author :
Lin, Chang-Hua ; Lu, Ying ; Lo, Yu-Kang ; Pai, Kai-Jun
Author_Institution :
Dept. of Comput. & Commun. Eng., St. John´´s & St. Mary´´s Inst. of Technol., xx
Abstract :
Maximum-efficiency tracking control applied in the backlight module is proposed in this paper. The backlight system incorporates a phase-locked loop as a feedback mechanism to promote both the system efficiency and stability. To overcome the drawbacks of the conventional electromagnetic transformer and miniaturize the backlight module, the piezoelectric transformer is adopted for driving the cold cathode fluorescent lamp. In addition, the PLL is utilized to track the optimal operating frequency of PT for achieving maximum output efficiency
Keywords :
circuit feedback; flat panel displays; fluorescent lamps; phase locked loops; resonant invertors; PLL; backlight module; backlight system; cold cathode fluorescent lamp; electromagnetic transformer; feedback mechanism; maximum efficiency tracking control; optimal operating frequency; phase locked loop; piezoelectric transformer; resonant inverters; stability; Communication system control; Frequency; Impedance; Inductors; Phase locked loops; RLC circuits; Resonance; Resonant inverters; Tracking loops; Voltage;
Conference_Titel :
Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on
Conference_Location :
Tainan
Print_ISBN :
0-7803-8660-4
DOI :
10.1109/APCCAS.2004.1412959
