Zero-Voltage-Switching Bi-Frequency Push-Pull Driver for Liquid Crystal Displays

In this paper, a bi-frequency control based zero-voltage-switching push-pull driver with a wide dimming range is proposed for the cold cathode fluorescent lamp (CCFL) based back lighting of the liquid crystal display (LCD). As a result, not only the design of the driver transformer can be simplified but also the efficiency of CCFL can be improved. Finally, a prototype is constructed for verifying the effectiveness of the proposed LCD driver.

[1]  R. Macian,et al.  A review of CCFL phenomenon , 2011 .

[2]  Gang-Youl Jeong.  A Novel Half-Bridge Resonant Inverter for CCFL-Driving , 2011, FGIT-GDC.

[3]  Feng Ran,et al.  Digital dimmable controller in CCFL module based on variable frequency technique , 2008, 2008 International Conference on Electronic Packaging Technology & High Density Packaging.

[4]  Sang Kyung Kim,et al.  A Low-Cost High-Efficiency CCFL Inverter With New Capacitive Sensing and Control , 2006, IEEE Transactions on Power Electronics.

[5]  T. Watanabe,et al.  Cold Cathode Fluorescent Lamps (CCFL): Revolutionary Light Source for Plant Micropropagation , 2009 .

[6]  M. Jordan,et al.  Resonant fluorescent lamp converter provides efficient and compact solution , 1993, Proceedings Eighth Annual Applied Power Electronics Conference and Exposition,.

[7]  Myung-Joong Youn,et al.  Digital CCFL drive system using individual current modulation for LCD-TV , 2010, 2010 IEEE Energy Conversion Congress and Exposition.