High-efficiency micro-LED displays with indistinguishable color shift

Fangwang Gou; En-Lin Hsiang; Guanjun Tan; Pei-Ting Chou; Yun-Li Li; Yi-Fen Lan; Shin-Tson Wu

doi:10.1117/12.2543223

26 February 2020 High-efficiency micro-LED displays with indistinguishable color shift

Fangwang Gou, En-Lin Hsiang, Guanjun Tan, Pei-Ting Chou, Yun-Li Li, Yi-Fen Lan, Shin-Tson Wu

Proceedings Volume 11304, Advances in Display Technologies X; 113040I (2020) https://doi.org/10.1117/12.2543223
Event: SPIE OPTO, 2020, San Francisco, California, United States

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.

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Citation Download Citation

Fangwang Gou, En-Lin Hsiang, Guanjun Tan, Pei-Ting Chou, Yun-Li Li, Yi-Fen Lan, and Shin-Tson Wu "High-efficiency micro-LED displays with indistinguishable color shift", Proc. SPIE 11304, Advances in Display Technologies X, 113040I (26 February 2020); https://doi.org/10.1117/12.2543223

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