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Proceedings Paper

High-precision color uniformity based on 4D transformation for micro-LED
Author(s): Kwangdon Kim; Taegyu Lim; Chanyul Kim; Seihan Park; Cheolseong Park; Changmin Keum
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Paper Abstract

Micro-LEDs are expected to bring revolution to display technology with its high brightness, long lifetime, refined performance and low power consumption. However, the electroluminescence spectrum of a Micro-LED varies significantly depending on the driving voltage and current, and thus ensuring the uniformity in red, green, blue colors in terms of the chromaticity and luminance across a massive amount of pixels is challenging for mass production. Due to its micron-level size, color correction by mechanical treatments is limited in practice. In order to overcome this bottleneck in the development and commercialization of Micro-LED technology, we propose a 4D transformation algorithm which allows to efficiently adjust non-linear chromaticity and luminance of Micro-LEDs and acquire the true color characteristics with high precision. We evaluate the performance of our algorithm with measurements and verify its outstanding performance compared to the conventional algorithms. The standard deviation of proposed uniformity correction result is about 2% and the color and luminance uniformity ΔE is below 3.5.

Paper Details

Date Published: 25 February 2020
PDF: 7 pages
Proc. SPIE 11302, Light-Emitting Devices, Materials, and Applications XXIV, 113021U (25 February 2020); doi: 10.1117/12.2542728
Show Author Affiliations
Kwangdon Kim, Samsung Electronics (Korea, Republic of)
Taegyu Lim, Motion2Ai Inc. (United States)
Chanyul Kim, Samsung Electronics (Korea, Republic of)
Seihan Park, Samsung Electronics (Korea, Republic of)
Cheolseong Park, Samsung Electronics (Korea, Republic of)
Changmin Keum, Samsung Electronics (Korea, Republic of)

Published in SPIE Proceedings Vol. 11302:
Light-Emitting Devices, Materials, and Applications XXIV
Jong Kyu Kim; Michael R. Krames; Martin Strassburg, Editor(s)

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