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Proceedings Paper

Quantum dots enabled LCD displays and solid-state lighting
Author(s): Wengang Bi; Shu Xu; Chong Geng; Fei Zhao; Xiaofang Jiang
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Paper Abstract

Quantum dots (QDs) with unique properties have evolved to be a key player in the next generation display and lighting applications. Followed by studies on the optimization of QD nanomaterials with low self-absorption properties, we analyze and identify the key parameters of the QDs that impact the color gamut and energy efficiency features of LCD displays using QD-enabled LED backlights, which consist of red and green QDs as well as blue LEDs that act as pumping sources. It is found that both the full width at half maximum (FWHM) and the emission peak positions of the green and the red QDs affect the color gamut. A narrower FWHM for both color QDs is preferred to achieve a wider color gamut while a combination of green QDs with shorter wavelength and red QDs with longer wavelength within the studied wavelength range (520 nm to 540 nm for the green and 610 nm to 635 nm for the red) is also desired. Nevertheless, QD-enabled LED backlight with a combination of longer-wavelength green QDs and shorter-wavelength red QDs is more energy efficient than the reverse case. Therefore, one needs balance these two key factors based on the targeted display performance requirements. On the solid-state lighting application side with QDs, we propose and show a QD-enabled LED light engine architecture that is more energy efficient with high light quality.

Paper Details

Date Published: 16 September 2016
PDF: 10 pages
Proc. SPIE 9924, Low-Dimensional Materials and Devices 2016, 992403 (16 September 2016); doi: 10.1117/12.2239927
Show Author Affiliations
Wengang Bi, Hebei Univ. of Technology (China)
Najing Technology Corp. Ltd. (China)
Shu Xu, Hebei Univ. of Technology (China)
Chong Geng, Hebei Univ. of Technology (China)
Fei Zhao, Najing Technology Corp. Ltd. (China)
Xiaofang Jiang, Najing Technology Corp. Ltd. (China)

Published in SPIE Proceedings Vol. 9924:
Low-Dimensional Materials and Devices 2016
Nobuhiko P. Kobayashi; A. Alec Talin; M. Saif Islam; Albert V. Davydov, Editor(s)

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