Design of the CCFL Driving Piezoelectric Inverter for Large-Screen LCD Backlight

Light source of liquid crystal display (LCD) is used cold cathode fluorescent lamp (CCLF) mainly, and the lamp driving method of LCD backlight inverter of 19 inches low selects H-L (high-low) method that is the most general lamp driving method and is using. However, medium-large sized LCD backlight inverters more than 21 inches are using H-H (high-high) method that is not existent H-L (high-low) method according as need higher driving voltage and current than small sized LCD In this paper, compared with H-L (high-low) lamp driving method applying H-H (high-high) method than is used to large sized LCD backlight inverter to the piezoelectric inverter, and verified that the characteristics of the multi lamp drives, efficiency and brightness through H-H (high-high) lamp driving method are excellent