The design and analysis of the piezoelectric inverter to the EEFL driving of LCD backlight

Cold cathode fluorescent lamp (CCFL) has been used for a source of light on LCDs, and external electrode fluorescent lamp (EEEFL), flat fluorescent lamp (FFL), field emission lamp (FEL) including LED is actively progressing application for other source of light. This paper used EEFL that has advantage for decrease inverter round figures, because is advantageous to multi lamp drive, transformer decrease loss in itself, miniaturization is possible, connect piezoelectric transformer that have high step-up ratio by multiple and did so that multi lamp drive may be possible. To compose EEFL driver circuit of ideal has been designed push-pull type of piezoelectric inverter. As achieve simulation analysis for designed inverter circuit, and hereafter will apply drive methods of several form, presented that manufacture of inverter for wide screen multi lamp drive is available by piezoelectric transformer.