| Title |
Steady-state Characteristics of the Piezoelectric Transformer and the Design of the Piezoelectric Inverter for Cold Cathode Fluorescent Lamp |
| Authors |
권기현(Gwon, Gi-Hyeon) ; 임영철(Im, Yeong-Cheol) ; 양승학(Yang, Seung-Hak) ; 정영국(Jeong, Yeong-Guk) |
| Keywords |
Piezoelectric Transformer ; Half-bridge Series Parallel Resonant Circuit ; Equivalent Circuit |
| Abstract |
The back-light inverter used in the laptop computer is designed in this paper. It has been difficult for electromagnetic transformer to enhance the efficiency and compact profile of the inverter. In this paper, (1) the piezoelectric transformer (PT) is used for reducing the loss; (2) the volumes of core and winding coil are used in electromagnetic transformer, and (3) the half-bridge series parallel resonant circuit is used in the driver of the inverter. The modified PT for this paper and the equivalent circuit are supported by the simulation program. The result of the experiment shows more than 91% improvement in terms of the efficiency. |