| Title |
LCD Backlight Drive Using The Piezoelectric Transformer |
| Authors |
Sung-Woon Im ; Youn-Ho Choi ; Chul-Ho Wan ; Bon-Ho Koo ; Lee-Kook Kim |
| Abstract |
The piezoelectric transformer converters electrical energy into mechanical energy. It is high efficiency and small size transformer for high output voltage. The piezoelectric transformer operates the resonance frequency and the output voltage waveform is close to sine wave. Therefore, it is suitable for driving the LCD backlight in the notebook computer. In this paper, we discussed about the inverter which is driving piezoelectric transformer by generating sine wave through LC resonance after converting input DC voltage to the gate signal of FET. As the result of experiments, it was showed that the resonance frequency and voltage gain of the piezoelectric transformer was proportional to the load variation, and voltage gain was independent of the input voltage variation. |