An Charge-Recycling Technique with Dual Outputs for Field Color Sequential applied in the RGB LED Backlight

  • Yang, Chih-Yu (Dept. of Electrical and Control Engineering National Chiao Tung University) ;
  • Hsieh, Chun-Yu (Dept. of Electrical and Control Engineering National Chiao Tung University) ;
  • Chen, Ke-Horng (Dept. of Electrical and Control Engineering National Chiao Tung University)
  • 발행 : 2009.10.12

초록

A boost converter with charge-recycling technique fabricated by $0.25{\mu}m$ CMOS BCD process can provide different supply voltages to drive series RGB LEDs in sequence for reducing the power consumption on the constant current generator. The proposed technique stores and restores extra energy to improve the efficiency, as well as enhances the reference tracking response. Experimental results show that the period of reference-tracking response can be improved. When the load current is 100mA, the periods of reference down-tracking and uptracking are smaller than $10{\mu}s$ and $20{\mu}s$, respectively. Experimental results demonstrate fast and efficient reference tracking performance is achieved.

키워드