| Title |
The Characteristics of Piezoelectric Transformer for Driving CCFL |
| Authors |
정수현(Jeong, Su-Hyun) ; 이종섭(Lee, Jong-Sub) ; 홍종국(Hong, Jong-Kuk) ; 채홍인(Chae, Hong-In) ; 윤만순(Yoon, Man-Soon) ; 임기조(Lim, Kee-Joe) |
| Keywords |
냉음극관 형광 램프 ; 압전 변압기 ; Λ 진동모드 ; 온도 상승 CCFL ; Piezoelectric transformer ; Λ vibration-mode ; Temperature increase |
| Abstract |
In this paper, the characteristics of piezoelectric transformer is studied for driving CCFL(Cold Cathode Fluorescent Lamp). In order to investigate the effects of geometrical dimensions, λvibration-mode type piezoelectric transformers with different sizes in the length(l), width(Ω) and thickness(t) are made of ceramics with PZT-PMWS compositions. The increases in temperature and aging effect are also measured in the transformer of PT-3 sample under the condition of operation continuously for 10 hrs. As the results of dimensional effects, the output power and voltage step-up ratio are largely affected by the ratio of length to thickness(l/t) rather than that of length to width(l/Ω). The output power and step-up ratio are increased with increasing l/t. On case of PT-3, the output voltages are 510[Vrms] at 36[Vrms] in input voltage, 100[kΩ] in load resistance. Temperature increases and variation of output voltages are 10[°C] and less than 5[%], respectively. |