CMOS-controlled color-tunable smart display

Zhang, S. et al. (2012) CMOS-controlled color-tunable smart display. IEEE Photonics Journal, 4(5), pp. 1639-1646. (doi:10.1109/JPHOT.2012.2212181)

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Abstract

We demonstrate a color-tunable smart display system based on a micropixelated light-emitting diode (micro-LED) array made from one InGaN epitaxial structure with high (0.4) indium mole fraction. When integrated with custom complementary metal–oxide–semiconductor (CMOS) electronics and a CMOS driving board with a field-programmable gate array (FPGA) configuration, this micro-LED device is computer controllable via a simple USB interface and is capable of delivering programmable dynamic images with emission colors changeable from red to green by tailoring the current densities applied to the micro-LED pixels. The color tunability of this CMOS-controlled device is attributed to the competition between the screening of piezo-electric field and the band filling effect. Comparable brightness of the micro-LED pixels emitting at different colors was achieved by adjusting the duty cycle. Further measurement suggests that this microdisplay system can also be used for high-speed visible light communications.

Item Type:Articles
Keywords:Complementary metal–oxide–semiconductor (CMOS), InGaN, micro light emitting diodes (micro-LEDs), color tunability, microdisplay, visible light communications (VLC)
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Watson, Dr Scott and Mckendry, Dr Jonathan and Kelly, Professor Anthony and Zhang, Dr Shuailong
Authors: Zhang, S., Gong, Z., Mckendry, J. D., Watson, S., Cogman, A., Xie, E., Tian, P., Gu, E., Chen, Z., Zhang, G., Kelly, A. E., Henderson, R. K., and Dawson, M. D.
Subjects:Q Science > QC Physics
T Technology > TK Electrical engineering. Electronics Nuclear engineering
College/School:College of Science and Engineering
College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:IEEE Photonics Journal
Journal Abbr.:IEEE Photon. J.
Publisher:IEEE
ISSN:1943-0655
ISSN (Online):1943-0655
Copyright Holders:Copyright © 2012 IEEE
First Published:First published in IEEE Photonics Journal 4(5):1639-1646
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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