An area-efficient fully R-DAC-based TFT-LCD column driver

Chih Wen Lu*, Chien Chih Shen, Wei Chih Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

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-μm CMOS technology to verify the proposed driving scheme. The settling time is within 5 μs, and the maximum deviation is 0.68 LSB. The average area per channel is 0.04 mm 2. Compared with a conventional fully R-DAC-based TFT-LCD column driver, the proposed driving scheme has a DAC area saving of 41%.

Original languageEnglish
Article number5456218
Pages (from-to)2588-2601
Number of pages14
JournalIEEE Transactions on Circuits and Systems I: Regular Papers
Volume57
Issue number10
DOIs
StatePublished - 2010

Keywords

  • Digitalanalog conversion
  • driver circuits
  • LCD driver
  • liquid crystal display (LCD)
  • offset cancellation

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