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

Chih Wen Lu; Chien Chih Shen; Wei Chih Chen

doi:10.1109/TCSI.2010.2046252

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

Institute of Lighting and Energy Photonics

Research output: Contribution to journal › Article › peer-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 language	English
Article number	5456218
Pages (from-to)	2588-2601
Number of pages	14
Journal	IEEE Transactions on Circuits and Systems I: Regular Papers
Volume	57
Issue number	10
DOIs	https://doi.org/10.1109/TCSI.2010.2046252
State	Published - 2010

Keywords

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

Access to Document

10.1109/TCSI.2010.2046252

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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%.",

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