Integrated Line Driver for Digital Pulse-Width Modulation Driven AMOLED Displays on Flex

Author

Genoe, Jan ; Obata, Koji ; Ameys, Marc ; Myny, Kris ; Tung Huei Ke ; Nag, Manoj ; Steudel, Soeren ; Schols, Sarah ; Maas, Joris ; Tripathi, Anand ; van der Steen, Jan-Laurens P. J. ; Ellis, T. ; Gelinck, Gerwin H. ; Heremans, Paul

Author_Institution

Large Area Electron. Dept., Imec, Leuven, Belgium

Volume

50

Issue

1

fYear

2015

fDate

Jan. 2015

Firstpage

282

Lastpage

290

Abstract

An integrated scan-line driver, driving half a QQVGA flexible AMOLED display using amorphous-IGZO backplane technology on foil, has been designed and measured. A pulse-width modulation technique has been implemented, enabling to drive the OLEDs with a duty cycle up to almost 100%. The digital driving method also results in a 40% static power reduction of the display. Dynamic logic and bootstrapping techniques enabled the use of clock frequencies up to 300 kHz in unipolar amorphous-IGZO technologies on foil.

Keywords

II-VI semiconductors; LED displays; amorphous semiconductors; bootstrap circuits; driver circuits; flexible displays; gallium compounds; indium compounds; organic light emitting diodes; pulse width modulation; InGaZnO₂; QQVGA flexible AMOLED display; bootstrapping techniques; digital driving method; duty cycle; dynamic logic technique; flex; frequency 300 kHz; integrated scan line driver; pulse width modulation technique; static power reduction; unipolar amorphous-IGZO backplane technology; Active matrix organic light emitting diodes; Backplanes; Clocks; Modulation; Registers; Transistors; Amorphous-IGZO; flexible displays; integrated line driver; low-power AMOLED displays; pulse-width modulation;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/JSSC.2014.2364268

Filename

6951490