A novel BLU-free full-color LED projector using LED on silicon micro-displays

Liu Z, Zhao Jun, Chong, Wing Cheung, Wong, Ka Ming ORCID: https://orcid.org/0000-0003-3770-1380, Tam, Ka Ho and Kei, May Lau 2013. A novel BLU-free full-color LED projector using LED on silicon micro-displays. IEEE Photonics Technology Letters 25 (23) , pp. 2267-2270. 10.1109/LPT.2013.2285229

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Abstract

In this letter, we have described the design and fabrication of a novel backlight-unit (BLU)-free full-color light emitting diode (LED) based projector. The prototype used three active matrix addressable light emitting diode on silicon (LEDoS) micro-displays with peak emission wavelengths of 630, 535, and 445 nm. The LEDoS micro-displays were realized by integrating monolithic micro-LED arrays and silicon-based integrated circuits using a flip-chip bonding technique. Since the LEDoS micro-displays are self-emitting, conventional BLUs used in liquid crystal displays were not needed. Using a trichroic prism to combine the light from the three LEDoS chips, we have produced the world's first three-LEDoS projector. This BLU-free three-LEDoS projector consists of much fewer optical components and has significantly higher light utilization efficiency compared with conventional projectors.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Publisher:	Institute of Electrical and Electronics Engineers
ISSN:	1041-1135
Last Modified:	05 Jun 2023 09:11
URI:	https://orca.cardiff.ac.uk/id/eprint/155660

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