An AMLED microdisplay driver SoC with built-in 1.25-Mb/s VLC transmitter

Author

Liang Wu ; Xianbo Li ; Wing Cheung Chong ; Zhaojun Liu ; Fengyu Che ; Hussain, Babar ; Lau, Kei May ; Yue, C. Patrick

Author_Institution

Hong Kong Univ. of Sci. & Technol., Hong Kong, China

fYear

2015

fDate

17-19 June 2015

Abstract

This paper presents the first active matrix LED (AMLED) microdisplay driver with built-in visible light communication (VLC) transmitter. The wide quarter-VGA (WQVGA) display features 400×240 pixels of 30×30 μm² micro-LEDs (μLED) on a single GaN IC flip-chip bonded to the proposed driver SoC. Pulse-width modulation (PWM) superimposed with on-off keying (OOK) modulation are employed for controlling the display grayscale and modulating the pixels with VLC data simultaneously. Implemented in 0.5-μm CMOS, the SoC enables a microdisplay module featuring 4-bit grayscale at 100-Hz frame rate while achieving 1.25-Mb/s lensless VLC up to 25 cm.

Keywords

LED displays; amplitude shift keying; flip-chip devices; gallium compounds; microdisplays; system-on-chip; wide band gap semiconductors; AMLED microdisplay driver SoC; GaN; IC flip-chip; VLC transmitter; active matrix LED; display grayscale; on-off keying modulation; pulse-width modulation; size 0.5 mum; visible light communication; wide quarter-VGA display; Gray-scale; Lenses; Light emitting diodes; Microdisplays; Modulation; Optical transmitters; System-on-chip;

fLanguage

English

Publisher

ieee

Conference_Titel

VLSI Circuits (VLSI Circuits), 2015 Symposium on

Conference_Location

Kyoto

Print_ISBN

978-4-86348-502-0

Type

conf

DOI

10.1109/VLSIC.2015.7231310

Filename

7231310