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Crystals 2019, 9(1), 39;

Tripling the Optical Efficiency of Color-Converted Micro-LED Displays with Funnel-Tube Array

College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA
AU Optronics Corp., Hsinchu Science Park, Hsinchu 300, Taiwan
Author to whom correspondence should be addressed.
Received: 13 December 2018 / Revised: 7 January 2019 / Accepted: 12 January 2019 / Published: 14 January 2019
(This article belongs to the Special Issue Advanced LED Solid-state Lighting Optics)
Full-Text   |   PDF [3859 KB, uploaded 14 January 2019]   |  


Color-converted micro-LED displays consist of a mono-color micro-LED array and color conversion materials to achieve full color, while relieving the burden of epitaxial growth of three-color micro-LEDs. However, it usually suffers from low efficiency and color crosstalk due to the limited optical density of color conversion materials. With funnel-tube array, the optical efficiency of the color-converted micro-LED display can be improved by ~3X, while the crosstalk is eliminated. After optimization of the tapper angle, the ambient contrast ratio is also improved due to higher light intensity. View Full-Text
Keywords: micro-LEDs; color conversion; color crosstalk; ambient contrast ratio micro-LEDs; color conversion; color crosstalk; ambient contrast ratio

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Gou, F.; Hsiang, E.-L.; Tan, G.; Lan, Y.-F.; Tsai, C.-Y.; Wu, S.-T. Tripling the Optical Efficiency of Color-Converted Micro-LED Displays with Funnel-Tube Array. Crystals 2019, 9, 39.

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