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http://dx.doi.org/10.5207/JIEIE.2003.17.2.028

LCD Backlight Drive Using The Piezoelectric Transformer  

임성운 (경북대학교 전자공학과)
최연호 (경북대학교 전자공학과)
원철호 (경북대학교 전자공학과)
구본호 (경북대학교 전자공학과)
김이국 (영남대 전기공학과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.17, no.2, 2003 , pp. 28-33 More about this Journal
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 os 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.
Keywords
LCD Backlight; Piezoelectric Transformer;
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  • Reference
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