Abstract

A freeform lens containing giant red and green quantum dots (QDs) was designed to be used for a direct-illumination-type LED backlight wide-color-gamut display. Encapsulating the QDs with the freeform lens enabled us to not only expand the illumination area, where the uniform lighting area was about 2 cm in radius on the plane 1.5 cm above the LED, but to also avoid QDs coming into direct contact with the LED chip, which reduced the QDs’ surrounding temperature from 94°C to 61°C. Moreover, this encapsulation and the thick shell of the QDs significantly improved the device’s lifetime up to more than 100 h due to the reduced temperature. A color gamut of $\sim 130\%$ of the National Television Systems Committee standard was obtained with the freeform lens.

© 2018 Optical Society of America

Flexible/curved backlight module with quantum-dots microstructure array for liquid crystal displays

Enguo Chen, Hongxing Xie, Jiamin Huang, Huanghui Miu, Genrong Shao, Yang Li, Tailiang Guo, Sheng Xu, and Yun Ye
Opt. Express 26(3) 3466-3482 (2018)

Full color display fabricated by CdSe bi-color quantum dots-based white light-emitting diodes

Shu-Ru Chung, Cyuan-Bin Siao, and Kuan-Wen Wang
Opt. Mater. Express 8(9) 2677-2686 (2018)

Multi-layer co-extruded quantum-dot diffuser plate for ultra-large TV backlights

Honglei Ji, Daochun Ye, Huaishu Xu, Enguo Chen, and Ziyi Ge
Opt. Mater. Express 12(4) 1648-1656 (2022)

Effective freeform TIR lens designed for LEDs with high angular color uniformity

Zhili Zhao, Honghai Zhang, Sheng Liu, and Xinzhong Wang
Appl. Opt. 57(15) 4216-4221 (2018)

Wide color gamut LCD with a quantum dot backlight

Zhenyue Luo, Yuan Chen, and Shin-Tson Wu
Opt. Express 21(22) 26269-26284 (2013)