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)
|
Text
104935.pdf - Published Version 1MB |
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 |
University Staff: Request a correction | Enlighten Editors: Update this record
Deposit and Record Details
Deposit and Record Details