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Highly Stable White Light-Emitting Diodes Based on Quantum-Dots Dispersed Into the Backlight Lens for Display Backlight

Authors :
Xu Yan Lan
Yong Zhang
Yu Sheng Liu
Hui Yu Yang
Xing Yang
Shu Wen Zheng
Yi Li
Source :
IEEE Photonics Journal, Vol 11, Iss 3, Pp 1-7 (2019)
Publication Year :
2019
Publisher :
Institute of Electrical and Electronics Engineers (IEEE), 2019.

Abstract

A novel package structure has been developed to fabricate quantum-dot (QD) white light-emitting diodes (WLEDs) by dispersing QDs into the backlight lens and integrating them with blue light-emitting diode to form white light. For this in-lens encapsulation structure, the luminous efficiency and lifetime of QD-WLEDs can reach 90 lm/W and 1000 h, which is 25 times longer than that of QD-WLEDs with on-chip encapsulation structure. Furthermore, a 32-inch prototype liquid crystal display TV shows a wide color gamut of 108% under the National Television Systems Committee standard with this in-lens encapsulation structure. The improvement performance should be attributed to providing a hermetic encapsulation environment preventing oxygen and water from reacting with the QDs and reducing the temperature of QDs due to in-lens package structure. Our results demonstrate that the in-lens solution can be a promising application in display backlight.

Details

ISSN :
19430647
Volume :
11
Database :
OpenAIRE
Journal :
IEEE Photonics Journal
Accession number :
edsair.doi.dedup.....9e5b91cf043916c0bbd0dd4c4d2fa5c8
Full Text :
https://doi.org/10.1109/jphot.2019.2916084