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

Volume

57

Issue

10

fYear

2010

Firstpage

2588

Lastpage

2601

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;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2010.2046252

Filename

5456218