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A multi-phase charge-sharing technique without external capacitor for low-power TFT-LCD column drivers

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4 Author(s)
Shao-Sheng Yang ; Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan ; Pao-Lin Guo ; Tsin-Yuan Chang ; Jin-Hua Hong

With up to 75% power saving efficiency, theoretically, with infinite phases, a novel multi-phase charge-recycling technique that does not require any external capacitor for charge conservation is proposed for the dot inversion method, to reduce AC power consumption of a TFT-LCD column driver. It is easy to implement with simple circuitry. Compared with the original circuit (without any low-power scheme) and previous low-power charge-recycling work, the proposed method, with each group of 8 data lines, decreases the power consumption about 23%-68% and 10%-18%, respectively.

Published in:

Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on  (Volume:5 )

Date of Conference:

25-28 May 2003