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Design and Simulation of Low Circadian Action Micro-LED Displays with Four Primary Colors
Open AccessArticle

Improving the Power Efficiency of Micro-LED Displays with Optimized LED Chip Sizes

1
College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA
2
AU Optronics Corp. Hsinchu Science Park, Hsinchu 300, Taiwan
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(6), 494; https://doi.org/10.3390/cryst10060494
Received: 22 May 2020 / Revised: 3 June 2020 / Accepted: 4 June 2020 / Published: 8 June 2020
(This article belongs to the Special Issue GaN-Based Optoelectronic Materials and Light Emitting Devices)
Micro-LED (light-emitting diode) is a potentially disruptive display technology, while power consumption is a critical issue for all display devices. In this paper, we develop a physical model to evaluate the power consumption of micro-LED displays under different ambient lighting conditions. Both power efficiency and ambient reflectance are investigated in two types of full color display structures: red/green/blue (RGB) micro-LEDs, and blue-LED pumped quantum dots color-conversion. For each type of display with uniform RGB chip size, our simulation results indicate that there exists an optimal LED chip size, which leads to 30–40% power saving. We then extend our model to analyze different RGB chip sizes, and find that with optimized chip sizes an additional 12% average power saving can be achieved over that with uniform chip size. View Full-Text
Keywords: micro-LED display; color-conversion; power consumption; ambient contrast ratio micro-LED display; color-conversion; power consumption; ambient contrast ratio
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Hsiang, E.-L.; He, Z.; Huang, Y.; Gou, F.; Lan, Y.-F.; Wu, S.-T. Improving the Power Efficiency of Micro-LED Displays with Optimized LED Chip Sizes. Crystals 2020, 10, 494.

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