High-speed column-line driving with polarity switch-embedded output buffer amplifiers for TFT-LCD application

Author

An, C.-H. ; Ko, J.-H. ; Kim, Hak-Rin ; Kong, B.-S.

Author_Institution

Dept. of Electr. & Comput. Eng., Sungkyunkwan Univ., Suwon, South Korea

Volume

51

Issue

1

fYear

2015

fDate

1 8 2015

Firstpage

18

Lastpage

20

Abstract

A novel high-speed column-line driving scheme having output buffer amplifiers embedded with polarity multiplexer switches is proposed for use in large-sized thin-film transistor liquid-crystal displays. The proposed driving scheme does not have explicit output-polarity switches, resulting in lower settling time. Experimental results in a 1.2 μm 13.5 V CMOS process indicated that using the proposed driving scheme the settling times to reach 99% of target voltages for the dot and column inversions were improved by up to 48.6%. This driving scheme can be applied to class AB- or class B-type amplifiers for liquid-crystal display column drivers and output buffers controlled by output switches.

Keywords

amplifiers; buffer circuits; driver circuits; liquid crystal displays; multiplexing equipment; thin film transistors; CMOS; TFT-LCD; class AB-type amplifiers; class B-type amplifiers; explicit output-polarity switches; liquid-crystal display column drivers; liquid-crystal displays; output buffers; output switches; polarity multiplexer switches; polarity switch-embedded output buffer amplifiers; size 1.2 mum; thin-film transistor; voltage 13.5 V;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2014.3304

Filename

7006851