Title :
An Area-Efficient Fully R-DAC-Based TFT-LCD Column Driver
Author :
Lu, Chih-Wen ; Shen, Chien-Chih ; Chen, Wei-Chih
Author_Institution :
Dept. of Electr. Eng., Nat. Chi Nan Univ., Puli, Taiwan
Abstract :
This paper proposes an area-efficient fully resistor-string digital-to-analog-converter (R-DAC)-based thin-film transistor liquid crystal display (TFT-LCD) column driver in which DACs supply only negative-polarity voltages, while polarity inverters generate positive-polarity voltages from negative-polarity voltages. An offset cancellation technique is employed in negative-polarity buffers and polarity inverters. An experimental prototype 8-bit column driver was implemented using 0.35-m CMOS technology to verify the proposed driving scheme. The settling time is within 5 s, and the maximum deviation is 0.68 LSB. The average area per channel is 0.04 mm2. Compared with a conventional fully R-DAC-based TFT-LCD column driver, the proposed driving scheme has a DAC area saving of 41%.
Keywords :
CMOS integrated circuits; digital-analogue conversion; driver circuits; liquid crystal displays; thin film transistors; CMOS technology; negative-polarity buffers; offset cancellation; polarity inverters; resistor-string digital-to-analog-converter; size 0.35 mum; thin-film transistor liquid crystal display column driver; Active matrix liquid crystal displays; CMOS technology; Driver circuits; Inverters; Liquid crystal displays; Prototypes; Resistors; Thin film transistors; Timing; Voltage; Digital–analog conversion; LCD driver; driver circuits; liquid crystal display (LCD); offset cancellation;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2010.2046252
