A TFT-LCD source-driver IC with charge-recycling technique

作者：Lu Chih Wen^*; Hsu Kuo Jen

来源：Analog Integrated Circuits and Signal Processing, 2011, 66(1): 19-29.

DOI：10.1007/s10470-010-9517-1

• Charge-recycling
• TFT-LCD
• Source driver
• Quiescent current
• Dynamic power

An innovative charge-recycling structure and a driving scheme for TFT-LCD source-driver IC application are proposed. A zero is used to obtain the stability and a coarse buffer is added to reduce the settling time. The numbers of switches and resistors, which are used for the charge recycling and stability, respectively, are greatly reduced. An experimental prototype 6-bit source driver with five-level seven-phase charge recycling implemented in a 0.35-mu m CMOS technology demonstrates that the dc current consumption is only 830 mu A for 262,144 colors and 102 mu A for 512 colors, dynamic power saving is 70%, and the settling time, which includes the charge-recycling and data driving, is within 25 mu s. The area overhead is only 130 x 1380 mu m(2).

• 出版日期2011-1
• 单位清华大学