Accurate quadruple-gamma-curve correction for line inversion-based mobile TFT-LCD driver ICS

Author

Woo, Jae-Hyuck ; Lee, June-Goo ; Jun, Young-Hyun ; Kong, B.-S.

Author_Institution

Coll. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon, South Korea

Volume

59

Issue

3

fYear

2013

fDate

Aug-13

Firstpage

443

Lastpage

451

Abstract

A line inversion-based gamma-curve correction scheme is presented for use in mobile TFT-LCD driver ICs. Novel voltage-symmetric gray curve synthesis (VSGS) method using a polarity-inverting gray voltage generator and variable resistor-tap biasing (VRTB) scheme using multioutput drivers have been adopted for accurately correcting gray curves for quadruple gamma values of y^1.0, y^1.8, y^2.2, and y^2.5. A test chip fabricated in a 6 V/0.7-μm triple-well CMOS process indicated that a gray voltage error was less than +8 mV, a gray-to-gray error-voltage difference was under +3 mV, and a pin-to-pin variation of each source driver output was +5 mV¹.

Keywords

CMOS analogue integrated circuits; driver circuits; liquid crystal displays; thin film transistors; VRTB scheme; VSGS method; gray voltage error; gray-to-gray error-voltage difference; line inversion-based mobile TFT-LCD driver IC; multioutput drivers; pin-to-pin variation; polarity-inverting gray voltage generator; quadruple gamma values; quadruple-gamma-curve correction scheme; size 0.7 mum; source driver output; triple-well CMOS process; variable resistor-tap biasing scheme; voltage 6 V; voltage-symmetric gray curve synthesis method; Capacitors; Generators; Image color analysis; Mobile communication; Resistors; Shape; Thin film transistors; Line inversion; TFT-LCD; gammacurvecorrection; multi-output driver; voltage symmetry;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2013.6626223

Filename

6626223