A novel charge recycler for TFT-LCD source driver IC

  • Authors:

  • Dan Li;Tingcun Wei;Wei Wu

  • Affiliations:

  • Northwestern Polytechnical University, Xi'an, China;Northwestern Polytechnical University, Xi'an, China;Northwestern Polytechnical University, Xi'an, China

  • Venue:
  • Proceedings of the 17th ACM Great Lakes symposium on VLSI
  • Year:
  • 2007

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Abstract

A novel charge recycler without any external capacitor for TFT-LCD source driver IC is proposed. Instead of grouping the adjacent source lines, the source lines of same color property for adjacent two sub-pixels are grouped to perform charge-recycling based on the color image properties of space correlation, time correlation and the dot-inversion driving principle. The power saving efficiency of proposed charge recycler is improved especially for the non-uniform color pattern compared with the previous method, and a power saving efficiency of 50% can be obtained theoretically. The HSPICE simulation results show that, for a typical non-uniform color pattern (R=0, G=127, B=255) the power saving efficiencies of the proposed method and the previous method are 49% and 25%, respectively. Considering the compressed row scan time, the proposed charge recycler is applicable for TFT-LCD applications with UXGA and higher resolution.