Abstract

A methodology, based on two-dimensional super-Gaussian light spread functions (LSFs), was studied for the light-emitting-diode (LED) backlighting system in the high dynamic range (HDR) liquid crystal displays (LCDs). We proposed a novel LED-based optomechanical configuration to implement the desirable luminous pattern. A dual-liquid-crystal-panel system was constructed as a pseudo-HDR LCD to evaluate the super-Gaussian illumination. The proposed HDR scheme was verified via the current platform: overall luminance uniformity, contrast ratio and processing speed could be improved by factors of 1.55, 1.95–4.15, and 4.82, respectively. The design flexibility made the methodology applicable to any panel dimension and backlight division of the HDR LCDs, and to the conventional full-on backlighting LCDs as well.

© 2009 IEEE

Zero-optical-distance mini-LED backlight with light-guiding microstructure lens for extra-thin, large-area notebook LCDs

Zhi Ting Ye, Yen Lung Chen, Chang Che Chiu, and Chia Chun Hu
Opt. Express 31(26) 43600-43614 (2023)

Edge/direct-lit hybrid mini-LED backlight with U-grooved light guiding plates for local dimming

Enguo Chen, Ju Guo, Zongzhao Jiang, Qiongxin Shen, Yun Ye, Sheng Xu, Jie Sun, Qun Yan, and Tailiang Guo
Opt. Express 29(8) 12179-12194 (2021)

Edge-lit LCD backlight unit for 2D local dimming

Gun-Wook Yoon, Seok-Won Bae, Yong-Bok Lee, and Jun-Bo Yoon
Opt. Express 26(16) 20802-20812 (2018)

Modified point spread function for efficient high dynamic range LED backlight capable of high uniformity, high contrast, and smooth gradients

Jakob Emmel and Lorne A. Whitehead
Appl. Opt. 52(34) 8239-8244 (2013)

Design of a brightness-enhancement-film-adaptive freeform lens to enhance overall performance in direct-lit light-emitting diode backlighting

Bin Xie, Run Hu, Qi Chen, Xingjian Yu, Dan Wu, Kai Wang, and Xiaobing Luo
Appl. Opt. 54(17) 5542-5548 (2015)