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Proceedings Paper

High-efficiency micro-LED displays with indistinguishable color shift
Author(s): Fangwang Gou; En-Lin Hsiang; Guanjun Tan; Pei-Ting Chou; Yun-Li Li; Yi-Fen Lan; Shin-Tson Wu
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Paper Abstract

Micro-scale light emitting diode (micro-LED) with a chip size less than 100 μm has improved light extraction efficiency due to increased sidewall emission. However, it causes mismatched angular distributions between AlGaInP-based red micro-LED and InGaN-based blue/green counterparts because of the epitaxial material difference. As a result, color shift of RGB micro-LED displays may become visually noticeable. To address this issue, the angular distributions of RGB micro-LEDs are analyzed theoretically and experimentally. In addition, a device structure with top black matrix and taper angle in micro-LEDs is proposed, which greatly suppresses the color shift while keeping a reasonably high light extraction efficiency.

Paper Details

Date Published: 26 February 2020
PDF: 8 pages
Proc. SPIE 11304, Advances in Display Technologies X, 113040I (26 February 2020); doi: 10.1117/12.2543223
Show Author Affiliations
Fangwang Gou, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
En-Lin Hsiang, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Guanjun Tan, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)
Pei-Ting Chou, PlayNitride Inc. (Taiwan)
Yun-Li Li, PlayNitride Inc. (Taiwan)
Yi-Fen Lan, PlayNitride, Inc. (Taiwan)
Shin-Tson Wu, CREOL, The College of Optics and Photonics, Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 11304:
Advances in Display Technologies X
Jiun-Haw Lee; Qiong-Hua Wang; Tae-Hoon Yoon, Editor(s)

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